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)