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 19:47 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
my relay will be smtp.fastmail.com and it requires authentication and SSL, are there added settings in main.cf that will allow this? Thanks On 4/19/20 1:09 PM, Jason Pyeron wrote:>> -----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 > _______________________________________________ > 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)
Richard
2020-Apr-19 20:05 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
> Date: Sunday, April 19, 2020 13:47:32 -0600 > From: "S.Bob" <sbob at quadratum-braccas.com> > > my relay will be smtp.fastmail.com and it requires authentication > and SSL, are there added settings in main.cf that will allow this?What port is that delivering to -- that doesn't sound like port 25, which is the default that an MTA delivers to. The postfix list may be a better place to ask these configuration questions. The general expectation there is that one has spent time going through the documentation.
Jonathan Billings
2020-Apr-19 20:15 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
> On Apr 19, 2020, at 3:47 PM, S.Bob <sbob at quadratum-braccas.com> wrote: > > my relay will be smtp.fastmail.com <http://smtp.fastmail.com/> and it requires authentication and SSL, are there added settings in main.cf that will allow this?Yes. You?ll want to use your favorite search engine to look up "centos postfix relayhost sasl?. Ignore any of the wiki.centos.org <http://wiki.centos.org/> links, they?re so out of date its embarrassing. (for example, the HowTos/postfix_sasl_relayhost wiki page tells you to use stunnel and an init service downloaded from a bugzilla post!) The important thing is you?ll set up smtp_sasl_password_maps to point to a file that has your username and password so it can authenticate against smtp.fastmail.com:587 <http://smtp.fastmail.com:587/>. You?ll have to make sure it goes to port 587 ? traffic from Comcast customers to external port 25 is blocked. -- Jonathan Billings <billings at negate.org>
Jason Pyeron
2020-Apr-19 20:18 UTC
[CentOS] [Off topic] sending mail from Comcast was: Sendmail not working
> -----Original Message----- > From: S.Bob > Sent: Sunday, April 19, 2020 3:48 PM > To: centos at centos.org > Subject: Re: [CentOS] [Off topic] sending mail from Comcast was: Sendmail not working > > my relay will be smtp.fastmail.com and it requires authentication and > SSL, are there added settings in main.cf that will allow this? >No, you are using Comcast / Xfininty per your IP address 50.243.150.81. Please follow the instuctions.> > Thanks > > > > On 4/19/20 1:09 PM, Jason Pyeron wrote: > >> -----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 > > _______________________________________________ > > 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
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