CentOS - Apr 2020 - [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

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)

> -----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

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)

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

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