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)