I should make clear in the post that u...@example.com is the IMAP mailbox name and that m...@example.com is a virtual alias. This machine hosts about 8 domains and has, I think, three mailboxes. I am the sole user of the email system.
On 11/28/2016 at 11:58 AM, rich.gre...@hushmail.com wrote: > >Okay, I am really curious how this works then. Good catch on the >'www' test. I winged it without reading the manpage. I've never >known a good starting point for learning DNS, so that is >definitely a weak point. So, now that the DNS is out of the way. >I'm going to dig deeper here. > >When I try to send a message to myself using Thunderbird, >m...@example.com, I get this > >Sending of the message failed. >The message could not be sent using Outgoing server (SMTP) >example.com for an unknown reason. Please verify that your >Outgoing server (SMTP) settings are correct and try again. > >Then about half a second later, a popup window appears titled 'Add >security exception' that begins "You are about to override how >Thunderbird identifies this site". I click on 'Get Certificate', >but it doesn't really do anything. > >So I look in the logs: > >mail.log > >Nov 28 18:34:56 example dovecot: imap-login: Login: >user=<u...@example.com>, method=PLAIN, rip=69.179.xxx.yyy, >lip=192.168.178.31, mpid=1291, TLS, session=<gfbp419CFsRFs3SF> >Nov 28 18:35:14 example postfix/smtpd[1293]: connect from 69-179- >xxx-yyy.dyn.centurytel.net[69.179.xxx.yyy] >Nov 28 18:35:16 example postfix/smtpd[1293]: warning: TLS library >problem: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert >unknown ca:s3_pkt.c:1472:SSL alert number 48: >Nov 28 18:35:16 example postfix/smtpd[1293]: lost connection after >STARTTLS from 69-179-xxx-yyy.dyn.centurytel.net[69.179.xxx.yyy] >Nov 28 18:35:16 example postfix/smtpd[1293]: disconnect from 69- >179-xxx-yyy.dyn.centurytel.net[69.179.xxx.yyy] ehlo=1 starttls=1 >commands=2 > >I have no idea what this means. > >The only other log file with a recent entry would be the auth.log >which seems to only detail the 20 or so attempts of SSH login each >minute from across the world, which is normal for anybody with a >website. > >Rick > >On 11/28/2016 at 11:12 AM, "Noel Jones" <njo...@megan.vbhcs.org> >wrote: >> >>On 11/28/2016 9:07 AM, rich.gre...@hushmail.com wrote: >>> Hello, >>> >>> First, email has been working fine on this server for past >>several months while using the Squirrelmail web client located on >>the same server. I am needing an alternative method to access >>mail services and decided, on a whim, to try Thunderbird. >>Thunderbird interacted with the Dovecot IMAP server just fine, >but >>when I tried to test sending mail over SMTP, it failed. I wish >the >>error they gave me was more verbose, but it wasn't. So I decided >>to test things in more detail. >>> >>> I decided that, since SMTP is a plain-text protocol, I should >be >>able to interact via telnet. Searching on this idea, I found a >>really interesting webpage >>> >>> https://www.port25.com/how-to-check-an-smtp-connection-with-a- >>manual-telnet-session-2/ >>> >>> There was something strange with the MX record. I modified the >>URL, of course. >>> >>> nslookup -type=mx example.com >>> Server: 8.8.8.8 >>> Address: 8.8.8.8#53 >>> >>> Non-authoritative answer: >>> example.com mail exchanger = 10 mail.example.com. >>> >>> Authoritative answers can be found from: >>> >>> >>> and that was it. >> >>Nothing wrong here, MX records don't contain an IP. You can >>compare >>with -type=mx gmail.com. >> >> >>> >>> I decided to perform the same test, but pull the www record and >>with that I actually got an IP address. >>> >>> nslookup -type=www example.com >>> unknown query type: www >>> Server: 8.8.8.8 >>> Address: 8.8.8.8#53 >>> >>> Non-authoritative answer: >>> Name: example.com >>> Address: 87.xxx.yyy.zzz >>> >> >>There is no type=www. This test is broken. >> >> >>http://www.postfix.org/DEBUG_README.html >> >>If you show postfix logs and describe the actual error you're >>getting, maybe someone can help. >>http://www.postfix.org/DEBUG_README.html#mail >> >> >> -- Noel Jones
