Jason Pyeron
2020-Apr-19 18:39 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
> -----Original Message----- > From: S.Bob > Sent: Sunday, April 19, 2020 2:26 PM > To: centos at centos.org > Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working > > I followed this guide: > > > https://pepipost.com/tutorials/install-sendmail-server-centos-7/Sigh - bad examples for you.... undo if you can. Postfix provides the "sendmail" utility. # rpm -qf `which sendmail` postfix-2.10.1-7.el7.x86_64> > > now I get this: > > > # echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com > [root at kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v > kevink at psalm19pix.com > kevink at psalm19pix.com... Connecting to [127.0.0.1] via relay... > kevink at psalm19pix.com... Deferred: Connection reset by [127.0.0.1] > Closing connection to [127.0.0.1]What does /var/log/maillog say ?> > > > Thoughts? > > > On 4/19/20 11:08 AM, Jason Pyeron wrote: > >> -----Original Message----- > >> From: Tim Evans > >> Sent: Sunday, April 19, 2020 12:50 PM > >> > >> On 4/19/20 12:38 PM, S.Bob wrote: > >>> On 4/19/20 10:36 AM, Tim Evans wrote: > >>>> On 4/19/20 12:28 PM, S.Bob wrote: > >>>>> All; > >>>>> > >>>>> > >>>>> I installed sendmail via yum, but if I test it like this: > >>>>> > >>>>> > >>>>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 > >>>>> from localhost [127.0.0.1] > >>>>> > >>>>> ----- The following addresses had permanent fatal errors ----- > >>>>> <sbob at quadratum-braccas.com> > >>>>> (reason: 554 5.7.1 Service unavailable; Client host > >>>>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; > >>>>> https://www.spamhaus > >>>>> .org/query/ip/50.243.150.81) > >>>> Is 50.243.150.81 your system's IP address? If so, as this shows, that > >>>> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is > >>>> working fine. Problem is elsewhere. > >>>> > >>>> anything I can do to fix it? > >> Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ > >> and request that it be removed from the blacklisted IP's. > >> > >> However, looking at the headers from your message, it appears Comcast > >> may be your ISP, and this 50.243.150.81 IP address appears to be a > >> Comcast address, so you may need to contact Comcast tech support for > >> help in getting the blacklist designation removed. > > There are a few situations here. > > > > 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP > (Comcast) > > > > 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) > SMTP and you have a domain elsewhere to receive replies to your email > > > > 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP > (Comcast) provided email. > > > > Only you would know which on for sure is you, but it is very likely #3. > > > > The advice provided previously is for case #1 - contact Comcast and inform them that your contracted > services are not working because of .... and you will need to beable to work with them on testing and > suggesting fixes. They have a dedicated support phone number (which they provided you if you are > actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) > > > > In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. > define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . > > > > Now when you send mail to that relay it will relay it. This is provided you are entitled to have > your email relayed - contact Xfinity customer service for help there. > > > > If using this relay does not work, please post the exchange starting with the HELO (check your > maillog or do it by hand with telnet). > > > > -- > > Jason Pyeron | Architect > > PD Inc | > > 10 w 24th St | > > Baltimore, MD | > > > > .com: jpyeron at pdinc.us > > tel : 202-741-9397 > > > > > > > > > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > -- > `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, > I got those with the system, *for free*".' (By Linus Torvalds) > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos
S.Bob
2020-Apr-19 18:52 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
I get this: # rpm -qf `which sendmail` postfix-2.10.1-7.el7.x86_64 sendmail-8.14.7-5.el7.x86_64 On 4/19/20 12:39 PM, Jason Pyeron wrote:>> -----Original Message----- >> From: S.Bob >> Sent: Sunday, April 19, 2020 2:26 PM >> To: centos at centos.org >> Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working >> >> I followed this guide: >> >> >> https://pepipost.com/tutorials/install-sendmail-server-centos-7/ > Sigh - bad examples for you.... undo if you can. > > Postfix provides the "sendmail" utility. > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > >> >> now I get this: >> >> >> # echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com >> [root at kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v >> kevink at psalm19pix.com >> kevink at psalm19pix.com... Connecting to [127.0.0.1] via relay... >> kevink at psalm19pix.com... Deferred: Connection reset by [127.0.0.1] >> Closing connection to [127.0.0.1] > > What does /var/log/maillog say ? > >> >> >> Thoughts? >> >> >> On 4/19/20 11:08 AM, Jason Pyeron wrote: >>>> -----Original Message----- >>>> From: Tim Evans >>>> Sent: Sunday, April 19, 2020 12:50 PM >>>> >>>> On 4/19/20 12:38 PM, S.Bob wrote: >>>>> On 4/19/20 10:36 AM, Tim Evans wrote: >>>>>> On 4/19/20 12:28 PM, S.Bob wrote: >>>>>>> All; >>>>>>> >>>>>>> >>>>>>> I installed sendmail via yum, but if I test it like this: >>>>>>> >>>>>>> >>>>>>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 >>>>>>> from localhost [127.0.0.1] >>>>>>> >>>>>>> ----- The following addresses had permanent fatal errors ----- >>>>>>> <sbob at quadratum-braccas.com> >>>>>>> (reason: 554 5.7.1 Service unavailable; Client host >>>>>>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; >>>>>>> https://www.spamhaus >>>>>>> .org/query/ip/50.243.150.81) >>>>>> Is 50.243.150.81 your system's IP address? If so, as this shows, that >>>>>> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is >>>>>> working fine. Problem is elsewhere. >>>>>> >>>>>> anything I can do to fix it? >>>> Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ >>>> and request that it be removed from the blacklisted IP's. >>>> >>>> However, looking at the headers from your message, it appears Comcast >>>> may be your ISP, and this 50.243.150.81 IP address appears to be a >>>> Comcast address, so you may need to contact Comcast tech support for >>>> help in getting the blacklist designation removed. >>> There are a few situations here. >>> >>> 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP >> (Comcast) >>> 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) >> SMTP and you have a domain elsewhere to receive replies to your email >>> 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP >> (Comcast) provided email. >>> Only you would know which on for sure is you, but it is very likely #3. >>> >>> The advice provided previously is for case #1 - contact Comcast and inform them that your contracted >> services are not working because of .... and you will need to beable to work with them on testing and >> suggesting fixes. They have a dedicated support phone number (which they provided you if you are >> actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) >>> In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. >> define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . >>> Now when you send mail to that relay it will relay it. This is provided you are entitled to have >> your email relayed - contact Xfinity customer service for help there. >>> If using this relay does not work, please post the exchange starting with the HELO (check your >> maillog or do it by hand with telnet). >>> -- >>> Jason Pyeron | Architect >>> PD Inc | >>> 10 w 24th St | >>> Baltimore, MD | >>> >>> .com: jpyeron at pdinc.us >>> tel : 202-741-9397 >>> >>> >>> >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos >> -- >> `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, >> I got those with the system, *for free*".' (By Linus Torvalds) >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos-- `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, I got those with the system, *for free*".' (By Linus Torvalds)
Jason Pyeron
2020-Apr-19 19:09 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
> -----Original Message----- > From: S.Bob > Sent: Sunday, April 19, 2020 2:52 PM > > > > I get this: > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > sendmail-8.14.7-5.el7.x86_64 >yum erase sendmail # undo what you did before... yum reinstall postfix # just in case it is messed up rpm -V postfix # lets verify if postfix is ok systemctl enable postfix # start on boot systemctl start postfix # start it now systemctl status postfix # see the status # setup Xfinity / Comcast SMTP relay ISP edit /etc/postfix/main.cf around line 315 add relayhost = [smtp.comcast.net] systemctl restart postfix # restart to make changes effective systemctl status postfix # check status echo "Subject: sendmail test4" | sendmail your_xfinity_email at comcast.com # if this works, then test outside email echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com # does it get there?> > > > On 4/19/20 12:39 PM, Jason Pyeron wrote: > >> -----Original Message----- > >> From: S.Bob > >> Sent: Sunday, April 19, 2020 2:26 PM > >> To: centos at centos.org > >> Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working > >> > >> I followed this guide: > >> > >> > >> https://pepipost.com/tutorials/install-sendmail-server-centos-7/ > > Sigh - bad examples for you.... undo if you can. > > > > Postfix provides the "sendmail" utility. > > > > # rpm -qf `which sendmail` > > postfix-2.10.1-7.el7.x86_64 > > > >> > >> now I get this: > >> > >> > >> # echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com > >> [root at kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v > >> kevink at psalm19pix.com > >> kevink at psalm19pix.com... Connecting to [127.0.0.1] via relay... > >> kevink at psalm19pix.com... Deferred: Connection reset by [127.0.0.1] > >> Closing connection to [127.0.0.1] > > > > What does /var/log/maillog say ? > > > >> > >> > >> Thoughts? > >> > >> > >> On 4/19/20 11:08 AM, Jason Pyeron wrote: > >>>> -----Original Message----- > >>>> From: Tim Evans > >>>> Sent: Sunday, April 19, 2020 12:50 PM > >>>> > >>>> On 4/19/20 12:38 PM, S.Bob wrote: > >>>>> On 4/19/20 10:36 AM, Tim Evans wrote: > >>>>>> On 4/19/20 12:28 PM, S.Bob wrote: > >>>>>>> All; > >>>>>>> > >>>>>>> > >>>>>>> I installed sendmail via yum, but if I test it like this: > >>>>>>> > >>>>>>> > >>>>>>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 > >>>>>>> from localhost [127.0.0.1] > >>>>>>> > >>>>>>> ----- The following addresses had permanent fatal errors ----- > >>>>>>> <sbob at quadratum-braccas.com> > >>>>>>> (reason: 554 5.7.1 Service unavailable; Client host > >>>>>>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; > >>>>>>> https://www.spamhaus > >>>>>>> .org/query/ip/50.243.150.81) > >>>>>> Is 50.243.150.81 your system's IP address? If so, as this shows, that > >>>>>> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is > >>>>>> working fine. Problem is elsewhere. > >>>>>> > >>>>>> anything I can do to fix it? > >>>> Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ > >>>> and request that it be removed from the blacklisted IP's. > >>>> > >>>> However, looking at the headers from your message, it appears Comcast > >>>> may be your ISP, and this 50.243.150.81 IP address appears to be a > >>>> Comcast address, so you may need to contact Comcast tech support for > >>>> help in getting the blacklist designation removed. > >>> There are a few situations here. > >>> > >>> 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP > >> (Comcast) > >>> 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) > >> SMTP and you have a domain elsewhere to receive replies to your email > >>> 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP > >> (Comcast) provided email. > >>> Only you would know which on for sure is you, but it is very likely #3. > >>> > >>> The advice provided previously is for case #1 - contact Comcast and inform them that your > contracted > >> services are not working because of .... and you will need to beable to work with them on testing > and > >> suggesting fixes. They have a dedicated support phone number (which they provided you if you are > >> actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) > >>> In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. > >> define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . > >>> Now when you send mail to that relay it will relay it. This is provided you are entitled to have > >> your email relayed - contact Xfinity customer service for help there. > >>> If using this relay does not work, please post the exchange starting with the HELO (check your > >> maillog or do it by hand with telnet). > >>> -- > >>> Jason Pyeron | Architect > >>> PD Inc | > >>> 10 w 24th St | > >>> Baltimore, MD | > >>> > >>> .com: jpyeron at pdinc.us > >>> tel : 202-741-9397 > >>> > >>> > >>> > >>> > >>> _______________________________________________ > >>> CentOS mailing list > >>> CentOS at centos.org > >>> https://lists.centos.org/mailman/listinfo/centos > >> -- > >> `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say > "Hey, > >> I got those with the system, *for free*".' (By Linus Torvalds) > >> > >> _______________________________________________ > >> CentOS mailing list > >> CentOS at centos.org > >> https://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > -- > `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, > I got those with the system, *for free*".' (By Linus Torvalds) > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos
S.Bob
2020-Apr-19 19:10 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
OK, I've fired up a new VM, new CentOS 7 install, now I get this: # rpm -qf `which sendmail` postfix-2.10.1-7.el7.x86_64 Can you point me to how to set this up properly? Note that I won the psalm19pix.com domain, it's hosted at fastmail.com, and as far as I know requires SSL. Can I setup sendmail to use this as it's SMPT connection? Thanks again... On 4/19/20 12:39 PM, Jason Pyeron wrote:>> -----Original Message----- >> From: S.Bob >> Sent: Sunday, April 19, 2020 2:26 PM >> To: centos at centos.org >> Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working >> >> I followed this guide: >> >> >> https://pepipost.com/tutorials/install-sendmail-server-centos-7/ > Sigh - bad examples for you.... undo if you can. > > Postfix provides the "sendmail" utility. > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > >> >> now I get this: >> >> >> # echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com >> [root at kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v >> kevink at psalm19pix.com >> kevink at psalm19pix.com... Connecting to [127.0.0.1] via relay... >> kevink at psalm19pix.com... Deferred: Connection reset by [127.0.0.1] >> Closing connection to [127.0.0.1] > > What does /var/log/maillog say ? > >> >> >> Thoughts? >> >> >> On 4/19/20 11:08 AM, Jason Pyeron wrote: >>>> -----Original Message----- >>>> From: Tim Evans >>>> Sent: Sunday, April 19, 2020 12:50 PM >>>> >>>> On 4/19/20 12:38 PM, S.Bob wrote: >>>>> On 4/19/20 10:36 AM, Tim Evans wrote: >>>>>> On 4/19/20 12:28 PM, S.Bob wrote: >>>>>>> All; >>>>>>> >>>>>>> >>>>>>> I installed sendmail via yum, but if I test it like this: >>>>>>> >>>>>>> >>>>>>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 >>>>>>> from localhost [127.0.0.1] >>>>>>> >>>>>>> ----- The following addresses had permanent fatal errors ----- >>>>>>> <sbob at quadratum-braccas.com> >>>>>>> (reason: 554 5.7.1 Service unavailable; Client host >>>>>>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; >>>>>>> https://www.spamhaus >>>>>>> .org/query/ip/50.243.150.81) >>>>>> Is 50.243.150.81 your system's IP address? If so, as this shows, that >>>>>> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is >>>>>> working fine. Problem is elsewhere. >>>>>> >>>>>> anything I can do to fix it? >>>> Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ >>>> and request that it be removed from the blacklisted IP's. >>>> >>>> However, looking at the headers from your message, it appears Comcast >>>> may be your ISP, and this 50.243.150.81 IP address appears to be a >>>> Comcast address, so you may need to contact Comcast tech support for >>>> help in getting the blacklist designation removed. >>> There are a few situations here. >>> >>> 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP >> (Comcast) >>> 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) >> SMTP and you have a domain elsewhere to receive replies to your email >>> 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP >> (Comcast) provided email. >>> Only you would know which on for sure is you, but it is very likely #3. >>> >>> The advice provided previously is for case #1 - contact Comcast and inform them that your contracted >> services are not working because of .... and you will need to beable to work with them on testing and >> suggesting fixes. They have a dedicated support phone number (which they provided you if you are >> actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) >>> In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. >> define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . >>> Now when you send mail to that relay it will relay it. This is provided you are entitled to have >> your email relayed - contact Xfinity customer service for help there. >>> If using this relay does not work, please post the exchange starting with the HELO (check your >> maillog or do it by hand with telnet). >>> -- >>> Jason Pyeron | Architect >>> PD Inc | >>> 10 w 24th St | >>> Baltimore, MD | >>> >>> .com: jpyeron at pdinc.us >>> tel : 202-741-9397 >>> >>> >>> >>> >>> _______________________________________________ >>> CentOS mailing list >>> CentOS at centos.org >>> https://lists.centos.org/mailman/listinfo/centos >> -- >> `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, >> I got those with the system, *for free*".' (By Linus Torvalds) >> >> _______________________________________________ >> CentOS mailing list >> CentOS at centos.org >> https://lists.centos.org/mailman/listinfo/centos > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos-- `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, I got those with the system, *for free*".' (By Linus Torvalds)
Jason Pyeron
2020-Apr-19 19:14 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
See other thread/reply.> -----Original Message----- > From: CentOS <centos-bounces at centos.org> On Behalf Of S.Bob > Sent: Sunday, April 19, 2020 3:11 PM > To: centos at centos.org > Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working > > OK, I've fired up a new VM, new CentOS 7 install, now I get this: > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > > > > Can you point me to how to set this up properly? Note that I won the > psalm19pix.com domain, it's hosted at fastmail.com, and as far as I know > requires SSL. Can I setup sendmail to use this as it's SMPT connection? >No idea what all of that means. Contact support at fastmail.com? I am only helping with you sending mail from Comcast ISP.> > Thanks again... > > > > > On 4/19/20 12:39 PM, Jason Pyeron wrote: > >> -----Original Message----- > >> From: S.Bob > >> Sent: Sunday, April 19, 2020 2:26 PM > >> To: centos at centos.org > >> Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working > >> > >> I followed this guide: > >> > >> > >> https://pepipost.com/tutorials/install-sendmail-server-centos-7/ > > Sigh - bad examples for you.... undo if you can. > > > > Postfix provides the "sendmail" utility. > > > > # rpm -qf `which sendmail` > > postfix-2.10.1-7.el7.x86_64 > > > >> > >> now I get this: > >> > >> > >> # echo "Subject: sendmail test4" | sendmail kevink at psalm19pix.com > >> [root at kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v > >> kevink at psalm19pix.com > >> kevink at psalm19pix.com... Connecting to [127.0.0.1] via relay... > >> kevink at psalm19pix.com... Deferred: Connection reset by [127.0.0.1] > >> Closing connection to [127.0.0.1] > > > > What does /var/log/maillog say ? > > > >> > >> > >> Thoughts? > >> > >> > >> On 4/19/20 11:08 AM, Jason Pyeron wrote: > >>>> -----Original Message----- > >>>> From: Tim Evans > >>>> Sent: Sunday, April 19, 2020 12:50 PM > >>>> > >>>> On 4/19/20 12:38 PM, S.Bob wrote: > >>>>> On 4/19/20 10:36 AM, Tim Evans wrote: > >>>>>> On 4/19/20 12:28 PM, S.Bob wrote: > >>>>>>> All; > >>>>>>> > >>>>>>> > >>>>>>> I installed sendmail via yum, but if I test it like this: > >>>>>>> > >>>>>>> > >>>>>>> The original message was received at Sun, 19 Apr 2020 10:02:56 -0600 > >>>>>>> from localhost [127.0.0.1] > >>>>>>> > >>>>>>> ----- The following addresses had permanent fatal errors ----- > >>>>>>> <sbob at quadratum-braccas.com> > >>>>>>> (reason: 554 5.7.1 Service unavailable; Client host > >>>>>>> [50.243.150.81] blocked using xbl.spamhaus.org.rbl.local; > >>>>>>> https://www.spamhaus > >>>>>>> .org/query/ip/50.243.150.81) > >>>>>> Is 50.243.150.81 your system's IP address? If so, as this shows, that > >>>>>> IP is on spamhaus' blacklist of addresses. Thus, your sendmail is > >>>>>> working fine. Problem is elsewhere. > >>>>>> > >>>>>> anything I can do to fix it? > >>>> Assuming this is your IP address, visit https://www.spamhaus.org/lookup/ > >>>> and request that it be removed from the blacklisted IP's. > >>>> > >>>> However, looking at the headers from your message, it appears Comcast > >>>> may be your ISP, and this 50.243.150.81 IP address appears to be a > >>>> Comcast address, so you may need to contact Comcast tech support for > >>>> help in getting the blacklist designation removed. > >>> There are a few situations here. > >>> > >>> 1. You are a business customer with a static IP, and are entitled to send/receive SMTP by your ISP > >> (Comcast) > >>> 2. You are a business/residential customer who is allowed to send (not likely allowed to receive) > >> SMTP and you have a domain elsewhere to receive replies to your email > >>> 3. You are a business/residential customer who is NOT allowed to send SMTP except for your ISP > >> (Comcast) provided email. > >>> Only you would know which on for sure is you, but it is very likely #3. > >>> > >>> The advice provided previously is for case #1 - contact Comcast and inform them that your > contracted > >> services are not working because of .... and you will need to beable to work with them on testing > and > >> suggesting fixes. They have a dedicated support phone number (which they provided you if you are > >> actually a #1 type customer - e.g. gigabit pro, metro Ethernet, etc.) > >>> In case you are a #2 or #3 type customer, you may want to use a smart host configuration - e.g. > >> define('SMART_HOST','[smtp.comcast.net]') . For postfix, use relayhost = [smtp.comcast.net] . > >>> Now when you send mail to that relay it will relay it. This is provided you are entitled to have > >> your email relayed - contact Xfinity customer service for help there. > >>> If using this relay does not work, please post the exchange starting with the HELO (check your > >> maillog or do it by hand with telnet). > >>> -- > >>> Jason Pyeron | Architect > >>> PD Inc | > >>> 10 w 24th St | > >>> Baltimore, MD | > >>> > >>> .com: jpyeron at pdinc.us > >>> tel : 202-741-9397 > >>> > >>> > >>> > >>> > >>> _______________________________________________ > >>> CentOS mailing list > >>> CentOS at centos.org > >>> https://lists.centos.org/mailman/listinfo/centos > >> -- > >> `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say > "Hey, > >> I got those with the system, *for free*".' (By Linus Torvalds) > >> > >> _______________________________________________ > >> CentOS mailing list > >> CentOS at centos.org > >> https://lists.centos.org/mailman/listinfo/centos > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > https://lists.centos.org/mailman/listinfo/centos > > -- > `When you say "I wrote a program that crashed Windows", people just stare at you blankly and say "Hey, > I got those with the system, *for free*".' (By Linus Torvalds) > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos
Jeffrey Walton
2020-Apr-19 19:14 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
On Sun, Apr 19, 2020 at 3:10 PM S.Bob <sbob at quadratum-braccas.com> wrote:> > OK, I've fired up a new VM, new CentOS 7 install, now I get this: > > # rpm -qf `which sendmail` > postfix-2.10.1-7.el7.x86_64 > > Can you point me to how to set this up properly? Note that I won the > psalm19pix.com domain, it's hosted at fastmail.com, and as far as I know > requires SSL. Can I setup sendmail to use this as it's SMPT connection?IIRC properly, many mail services don't accept over port 25 any longer. It is due to a combination of spam and plain text data. Also see https://en.wikipedia.org/wiki/Message_submission_agent. You have to use port 587. Jeff
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