CentOS - Apr 2020 - [Off topic] sending mail from Comcast was: Sendmail not working

> -----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

I followed this guide:


https://pepipost.com/tutorials/install-sendmail-server-centos-7/


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]



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)

On Apr 19, 2020, at 14:25, S.Bob <sbob at quadratum-braccas.com>
wrote:
> 
> I followed this guide:
> 
> 
> https://pepipost.com/tutorials/install-sendmail-server-centos-7/
> 
> 
> 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]
Looks like the sendmail service isn?t running. Maybe it not starting because of
a syntax errors?
> Thoughts?
I?d probably not use send mail in the first place. Postfix is the default,
recommended MTA in CentOS 7, and its less likely to have mysterious syntax
errors and easier to understand configuration syntax.  (Sendmail?s config
language is so complex that most people just use M4 and ?compile? it into the
sendmail.cf)



--
Jonathan Billings <billings at negate.org>

> -----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