-----Original Message----- From: S.Bob Sent: Sunday, April 19, 2020 3:48 PM To: centos@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@comcast.com # if this works, then test
outside email
echo "Subject: sendmail test4" | sendmail kevink@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@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@psalm19pix.com [root@kdb-bugs auth]# echo "Subject: sendmail test4" | sendmail -v kevink@psalm19pix.com kevink@psalm19pix.com... Connecting to [127.0.0.1] via relay... kevink@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@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.
- You are a business customer with a static IP, and are entitled to send/receive SMTP by your
ISP
(Comcast)
- 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
- 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@pdinc.us tel : 202-741-9397
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