Search results for "Cannot connect to SMTP server"

[MM3-users] Re: Mailman3 doesn't send Mails to users (Debian12 with Plesk)

by Mark Sapiro

On 5/24/24 2:18 AM, marcus--- via Mailman-users wrote: > > The problem, however, is that it does not send out any mails, nor do they appear in the archive. > > When I look in the Mailman-Log I find: > > May 16 01:44:55 2024 (6833) Cannot connect to SMTP server localhost on port 25 This is a misleading error message. It can occur when Mailman's out runner can't read a template. You need to check ownership and permissions on mailman/templates in the code tree and Mailman's var/templates directory which probably has permissions errors from running inport21 as root. Also, if you've set any templates in Postorius, they may not be accessable if your setting for POSTORIUS_TEMPLATE_BASE_URL is not good. > May 16 01:48:15 2024 (61252) error opening connection to nntp_host: localhost > [Errno 111] Connection refused > May 16 01:48:15 2024 (61252) NNTP error for list vereinsmitglieder(a)ludothek.de: > [Errno 111] Connection refused Are you gating messages to/from usenet for this list? If so, you have to set host: and port: and maybe user: and password in the nntp section of mailman.cfg -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan

1 year, 3 months

[MM3-users] Re: Uncaught runner exception

by Wolfgang Bock

Yes, and I made all the tests as discribed here: https://workaround.org/ispmail/buster/relaying-through-postfix/ including the swaks test mentioned before output of sudo netstat -lntup | grep ":25" tcp 0 0 0.0.0.0:25 0.0.0.0:* LISTEN 20660/master tcp6 0 0 :::25 :::* LISTEN 20660/master output of sudo lsof -i :25 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME master 20660 root 13u IPv4 1474228 0t0 TCP *:smtp (LISTEN) master 20660 root 14u IPv6 1474229 0t0 TCP *:smtp (LISTEN) Regards Wolfgang -----Ursprüngliche Nachricht----- Von: Mark Sapiro <mark(a)msapiro.net> Gesendet: Dienstag, 7. April 2020 21:28 An: mailman-users(a)mailman3.org Betreff: [MM3-users] Re: Uncaught runner exception On 4/7/20 3:22 AM, Wolfgang Bock via Mailman-users wrote: > Apr 07 12:09:21 2020 (28206) Cannot connect to SMTP server localhost > on port 25 > > I have no idea what to do for solving my problems. Can you successfully telnet localhost 25 from a shell on the server? -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan _______________________________________________ Mailman-users mailing list -- mailman-users(a)mailman3.org To unsubscribe send an email to mailman-users-leave(a)mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/

5 years, 5 months

[MM3-users] Re: Uncaught runner exception

by Mark Sapiro

On 4/7/20 3:22 AM, Wolfgang Bock via Mailman-users wrote: > Apr 07 12:09:21 2020 (28206) Cannot connect to SMTP server localhost on port 25 > > I have no idea what to do for solving my problems. Can you successfully telnet localhost 25 from a shell on the server? -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan

5 years, 5 months

[MM3-users] Re: Uncaught runner exception

by Wolfgang Bock

Thank you Steven for your reply! I Set smtp_server to port 25 and got a "Cannot connect ro SMTP Server on port 25", the former error message didn't show again. As I see port 25 is reseved for postfix. So I have to fiddle out how mailman3 could also use this port for sending mails out. .... Regards Wolfgang -----Ursprüngliche Nachricht----- Von: Stephen J. Turnbull <turnbull.stephen.fw(a)u.tsukuba.ac.jp> Gesendet: Montag, 6. April 2020 14:56 An: Wolfgang Bock <mailinglisten(a)wbock.de> Cc: 'mailman-users' <mailman-users(a)mailman3.org> Betreff: [MM3-users] Uncaught runner exception Wolfgang Bock via Mailman-users writes: > smtp_host: Tried with 127.0.0.1/localhost/server ip or FQDN=servername > smtp_port: (got a "cannot connect to SMTP Server on port 25") so I let this > item empty ... This is your problem. By default, it should be port 25. Apparently there is no fallback for this in case it's left empty. (I would guess if you commented it out, it *would* fall back to port 25. > Apr 06 00:03:26 2020 (31153) ACCEPT: > <6a504834-123a-60f6-3a0e-494623b74523(a)mailbox.org> > Apr 06 00:03:26 2020 (31156) Uncaught runner exception: invalid literal for > int() with base 10: '' This is saying int() was called with the empty string as argument. > Apr 06 00:03:26 2020 (31156) Traceback (most recent call last): [intermediate frames omitted] > File "/usr/lib/python3/dist-packages/mailman/mta/base.py", line 45, in > __init__ > config.mta.smtp_host, int(config.mta.smtp_port), The call to int() in the line above is getting the empty value from the config file. Changing smtp_port to '25' (or the appropriate value) in the config file will prevent the "Uncaught runner exception". If localhost's smptd is not listening on port 25, as the comment above seems to indicate, you either need to - find out the correct value if smptd is listening on a different port, - enable that daemon if it's not running, or - point smtp_host at a functioning outgoing mail server if localhost is not expected to be a mail server. In the latter two cases you also need to make sure smtp_port is correct for the server you use. There are some other, rarer and more complicated, possibilities, so if your answer is "none of the above", feel free to say so. But check those first, please. Steve _______________________________________________ Mailman-users mailing list -- mailman-users(a)mailman3.org To unsubscribe send an email to mailman-users-leave(a)mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/

5 years, 5 months

[MM3-users] Re: Bulk changes to delivery mode and moderation action

by Mark Sapiro

On 1/7/22 6:07 PM, David Newman wrote: > On 1/7/22 4:32 PM, Mark Sapiro wrote: > >> I suspect an issue trying to connect to the MTA to send the messages. >> This can be caused by permission errors. Check permissions on >> Mailman's var/templates/* > > Bingo. This list had regular and digest footer templates with 0644 > permissions owned by root:root, and there was an exception and traceback > for the most recent message in shunt about the permissions issue. That comes from running `mailman import21` as `root`. Always run `mailman` commands as the Mailman user. > I've changed ownership to mailman:mailman and restarted the mailman3 > service. > > As soon as I fixed this, my inbox filled with test messages... Good! >> Is there a 'Cannot connect to SMTP server ... on port ...' anywhere in >> mailman.log? > > Yes, lots. This might or might not be a different issue. It is exactly this issue which is now corrected. > As I mentioned earlier, the most recent message in shunt was from 0000 > hours today. There are many "Cannot connect" messages since then, but > none since fixing the issue above. The Cannot connect messages are from the issue of ownership of the templates and Mailman's out runner continually retrying the send. This is separate from the shunted messages. > Seems OK now. The superuser sees all posts after the unshunt action. So it appears that you ran `mailman unshunt` and the shunted messages were successfully processed, so whatever caused them to be shunted in the first place is fixed. Individual messages don't get shunted because of this template ownership issue, but it may be that digests do get shunted for this reason. -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan

3 years, 8 months

[MM3-users] Re: Bulk changes to delivery mode and moderation action

by Mark Sapiro

On 1/7/22 3:41 PM, David Newman wrote: > > There are 24 messages in the shunt queue, the most recent of which is a > digest from 0000 hours today. The test messages I sent later today are > not there. > > There are also 13 messages in the out queue. I can't read these as the > filenames appear to change on every invocation of ls. I suspect an issue trying to connect to the MTA to send the messages. This can be caused by permission errors. Check permissions on Mailman's var/templates/* >> Are there errors and tracebacks in var/logs/mailman.log? Every message in the shunt queue should have an exception and traceback logged in mailman.log. > But the Postfix log doesn't show it being distributed to me or anyone else. Is there a 'Cannot connect to SMTP server ... on port ...' anywhere in mailman.log? > Oddly, neither of the two list owner emails (me and someone else) show > this message in the archive via the admin panel. However if I log in as > the list owner directly to the archives: > > https://lists.domain.tld/archives/ > > I can see today's test posts if logged in as the list member, but do not > see the posts if logged directly into the archive as the Django superuser. That seems strange, I don't know why the superuser would not be able to see things in the archive that a list owner or member can. > The nondelivery of list mail is more serious than the archive problem, > though. Archiving is separate from delivery. messages can be archived and still fail delivery in the out runner which is what's happening here. The question is why? I suspect you have one or more 'Cannot connect to SMTP server ... on port ...' messages in mailman.log? and I suspect this is a misleading issue in this case caused by an inability to read some file in Mailman's var/templates/lists/<list_id>/en directory. I also suspect the shunted messages are from some prior condition which has possibly been fixed, but I can't be sure without exceptions and tracebacks from mailman.log (should be timestamped the same as the mod time if the shunted file). You can view them with `mailman qfile` and unshunt (reprocess) them with `mailman unshunt`. -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan

3 years, 8 months

[MM3-users] Uncaught runner exception

by Wolfgang Bock

Hello, I need your help. I got a "Uncaught runner exception: invalid literal for int() with base 10:" Referring to a discussion in Sept. 2019 with Manos Pitsidianakis "Cannot connect to SMTP server localhost on port 25" I did following: stop both postfix and mailman 3 services. Deleted all files in the /var/lib/mailman3/queue directories. Restarted both services. With following configurations: (extracts): /etc/mailman3/mailman.cfg [mta] incoming: mailman.mta.postfix.LMTP outgoing: mailman.mta.deliver.deliver smtp_host: Tried with 127.0.0.1/localhost/server ip or FQDN=servername smtp_port: (got a "cannot connect to SMTP Server on port 25") so I let this item empty ... smtp_user: smtp_pass: lmtp_host: 127.0.0.1 lmtp_port: 8024 configuration: python:mailman.config.postfix /var/log/postfix/mail.info Apr 6 00:02:22 ... postfix/postfix-script[31407]: starting the Postfix mail system Apr 6 00:02:22 ... postfix/master[31409]: daemon started -- version 3.4.8, configuration /etc/postfix Apr 6 00:03:09 ... postfix/smtpd[31462]: connect from mout-p-103.mailbox.org[80.241.56.161] Apr 6 00:03:09 ... policyd-spf[31468]: prepend Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=80.241.56.161; helo=mout-p-103.mailbox.org; envelope-from=[mail address]; receiver=<UNKNOWN> Apr 6 00:03:09 ... postfix/smtpd[31462]: D29FE138023E: client=mout-p-103.mailbox.org[80.241.56.161] Apr 6 00:03:09 ... postfix/cleanup[31471]: D29FE138023E: message-id=<6a504834-123a-60f6-3a0e-494623b74523(a)mailbox.org> Apr 6 00:03:25 ... postfix/qmgr[31411]: D29FE138023E: from=<[mail address]>, size=2811, nrcpt=1 (queue active) Apr 6 00:03:25 ... postfix/smtpd[31462]: disconnect from mout-p-103.mailbox.org[80.241.56.161] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7 Apr 6 00:03:25 ... postfix/lmtp[31481]: D29FE138023E: to=<[list address]>, relay=127.0.0.1[127.0.0.1]:8024, delay=16, delays=16/0.01/0/0.1, dsn=2.0.0, status=sent (250 Ok) Apr 6 00:03:25 ... postfix/qmgr[31411]: D29FE138023E: removed /var/log/mailman3/mailman.log Apr 06 00:02:12 2020 (31148) Master started Apr 06 00:02:13 2020 (31158) rest runner started. Apr 06 00:02:13 2020 (31150) archive runner started. Apr 06 00:02:13 2020 (31159) retry runner started. Apr 06 00:02:14 2020 (31161) virgin runner started. Apr 06 00:02:14 2020 (31154) lmtp runner started. Apr 06 00:02:14 2020 (31155) nntp runner started. Apr 06 00:02:14 2020 (31153) in runner started. Apr 06 00:02:14 2020 (31151) bounces runner started. Apr 06 00:02:15 2020 (31157) pipeline runner started. Apr 06 00:02:15 2020 (31152) command runner started. Apr 06 00:02:15 2020 (31162) digest runner started. Apr 06 00:02:16 2020 (31156) out runner started. Apr 06 00:03:26 2020 (31153) ACCEPT: <6a504834-123a-60f6-3a0e-494623b74523(a)mailbox.org> Apr 06 00:03:26 2020 (31156) Uncaught runner exception: invalid literal for int() with base 10: '' Apr 06 00:03:26 2020 (31156) Traceback (most recent call last): File "/usr/lib/python3/dist-packages/mailman/core/runner.py", line 173, in _one_iteration self._process_one_file(msg, msgdata) File "/usr/lib/python3/dist-packages/mailman/core/runner.py", line 266, in _process_one_file keepqueued = self._dispose(mlist, msg, msgdata) File "/usr/lib/python3/dist-packages/mailman/runners/outgoing.py", line 93, in _dispose self._func(mlist, msg, msgdata) File "/usr/lib/python3/dist-packages/mailman/mta/deliver.py", line 77, in deliver agent = BulkDelivery(int(config.mta.max_recipients)) File "/usr/lib/python3/dist-packages/mailman/mta/bulk.py", line 50, in __init__ super().__init__() File "/usr/lib/python3/dist-packages/mailman/mta/base.py", line 45, in __init__ config.mta.smtp_host, int(config.mta.smtp_port), Any hints how to solve the problem?? Regards Wolfgang

5 years, 5 months

[MM3-users] Re: Held messages not delivered after approval

by Krinetzki, Stephan

Hi Mark, >That's a misleading message. It's been improved by https://gitlab.com/mailman/mailman/-/merge_requests/1362, however usually the underlying issue is inability to access a header or footer template when decorating the message. This in turn is most likely >caused by some template(s) in Mailman's var/templates/ directory being owned by `root` or some other non-mailman user and not readable by the Mailman user which in turn most likely results from running `mailman import21` as root. You are my hero! After "patching" the outgoing.py file with the error messages I got Aug 06 09:52:51 2025 (443278) Cannot connect to SMTP server 127.0.0.1 on port 25: HTTPSConnectionPool(host='lists.example.com', port=443): Max retries exceeded with url: /postorius/api/templates/list/hpc-admintreffen-info.lists.example.com/list:member:regular:footer (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1006)'))) And was shocked. Why is there an SSL Certificate Error? Why can't python requests verify the certificate? So I googled a bit and found, that we can fix this be editing the cacert.pem of certifi. I did, but the error was still there. So I checked my https VHost (Apache btw) and there was a wrong chain in it. Oof. An error, that a browser does not see, but any ssl client. I fixed it and boom - everything works again. Thank you again and thank you Stephen for trying to resolve the problem 😊 -- Stephan Krinetzki IT Center Gruppe: Anwendungsbetrieb und Cloud Abteilung: Systeme und Betrieb RWTH Aachen University Seffenter Weg 23 52074 Aachen Tel: +49 241 80-24866 Fax: +49 241 80-22134 krinetzki(a)itc.rwth-aachen.de www.itc.rwth-aachen.de Social Media Kanäle des IT Centers: https://blog.rwth-aachen.de/itc/ https://www.facebook.com/itcenterrwth https://www.linkedin.com/company/itcenterrwth https://twitter.com/ITCenterRWTH https://www.youtube.com/channel/UCKKDJJukeRwO0LP-ac8x8rQ -----Original Message----- From: Mark Sapiro <mark(a)msapiro.net> Sent: Tuesday, August 5, 2025 6:19 PM To: mailman-users(a)mailman3.org Subject: [MM3-users] Re: Held messages not delivered after approval On 8/5/25 02:06, Krinetzki, Stephan wrote: > Aug 05 10:21:05 2025 (217986) Cannot connect to SMTP server localhost > on port 25 > > The last error is a very often in the mailman.log: That's a misleading message. It's been improved by https://gitlab.com/mailman/mailman/-/merge_requests/1362, however usually the underlying issue is inability to access a header or footer template when decorating the message. This in turn is most likely caused by some template(s) in Mailman's var/templates/ directory being owned by `root` or some other non-mailman user and not readable by the Mailman user which in turn most likely results from running `mailman import21` as root. Bottom line - check that all sub-directories and files in Mailman's var/templates/ directory are searchable and readable by the Mailman user. -- Mark Sapiro <mark(a)msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan _______________________________________________ Mailman-users mailing list -- mailman-users(a)mailman3.org To unsubscribe send an email to mailman-users-leave(a)mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/ Archived at: https://lists.mailman3.org/archives/list/mailman-users@mailman3.org/message… This message sent to krinetzki(a)itc.rwth-aachen.de

1 month, 1 week

[MM3-users] Trying to set up mailman3 on my mail server

by Shawn Heisey

I'm having a lot of trouble with trying to set up mailman3 on my mail server. It's on an AWS instance, running Ubuntu 20.04 LTS. All software is installed from Ubuntu packages. Mailman version is 3.2.2. The problem I am trying to troubleshoot first is how this can be happening: Oct 14 11:27:26 2021 (2341) ACCEPT: <f36e1ed0-9d25-b661-9c94-4ce999f6d5fd(a)elyograg.org> Oct 14 11:27:27 2021 (2344) Cannot connect to SMTP server 127.0.0.1 on port 25 From the shell, I can "telnet localhost 25" successfully, even as the "list" user. Apparmor is disabled. The UFW firewall is enabled, which allows all traffic on the loopback interface. I disabled ipv6 at the kernel level, but had the same problem with ipv6 enabled, so I don't think ipv6 is related at all. I do not see any connections in the postfix log that correspond to the mailman connection error. From a fresh install of mailman, I created two mailing lists. Once upon a time I had those lists active on a Debian 6 machine running mailman 2.1.13 ... I copied the mailing list config from that machine over and used the "import21" facility to import the configuration into the new mailman3 install. That worked without error and I can see the lists and their members with the "mailman" command. I found instructions for integration with postfix, and added the required three config lines to the postfix config. When I try to send a message to the list, I get what I pasted above in the mailman log. I think that means the postfix integration is working, and is forwarding to mailman. I'm hoping somebody can give me some pointers, and if more information is needed for troubleshooting, let me know what is needed. I'm also having trouble with the web UI ... I thought I had found what to do with Apache, but it's having problems and I do not know what to do so it works. The UI is not super important right now, I'd like to get the lists working first. I first tried to get help on the IRC channel, but that appears to be a dead end. I did give it several hours. Thanks, Shawn

3 years, 11 months

[MM3-users] WG: Re: Uncaught runner exception

by Wolfgang Bock

Hello Stephen, I have to apologize for misspelling your name! Sorry! Regards Wolfgang -----Ursprüngliche Nachricht----- Von: Wolfgang Bock via Mailman-users <mailman-users(a)mailman3.org> Gesendet: Montag, 6. April 2020 23:44 An: 'mailman-users' <mailman-users(a)mailman3.org> Betreff: [MM3-users] Re: Uncaught runner exception Thank you Steven for your reply! I Set smtp_server to port 25 and got a "Cannot connect ro SMTP Server on port 25", the former error message didn't show again. As I see port 25 is reseved for postfix. So I have to fiddle out how mailman3 could also use this port for sending mails out. .... Regards Wolfgang -----Ursprüngliche Nachricht----- Von: Stephen J. Turnbull <turnbull.stephen.fw(a)u.tsukuba.ac.jp> Gesendet: Montag, 6. April 2020 14:56 An: Wolfgang Bock <mailinglisten(a)wbock.de> Cc: 'mailman-users' <mailman-users(a)mailman3.org> Betreff: [MM3-users] Uncaught runner exception Wolfgang Bock via Mailman-users writes: > smtp_host: Tried with 127.0.0.1/localhost/server ip or FQDN=servername > smtp_port: (got a "cannot connect to SMTP Server on port 25") so I let this > item empty ... This is your problem. By default, it should be port 25. Apparently there is no fallback for this in case it's left empty. (I would guess if you commented it out, it *would* fall back to port 25. > Apr 06 00:03:26 2020 (31153) ACCEPT: > <6a504834-123a-60f6-3a0e-494623b74523(a)mailbox.org> > Apr 06 00:03:26 2020 (31156) Uncaught runner exception: invalid literal for > int() with base 10: '' This is saying int() was called with the empty string as argument. > Apr 06 00:03:26 2020 (31156) Traceback (most recent call last): [intermediate frames omitted] > File "/usr/lib/python3/dist-packages/mailman/mta/base.py", line 45, in > __init__ > config.mta.smtp_host, int(config.mta.smtp_port), The call to int() in the line above is getting the empty value from the config file. Changing smtp_port to '25' (or the appropriate value) in the config file will prevent the "Uncaught runner exception". If localhost's smptd is not listening on port 25, as the comment above seems to indicate, you either need to - find out the correct value if smptd is listening on a different port, - enable that daemon if it's not running, or - point smtp_host at a functioning outgoing mail server if localhost is not expected to be a mail server. In the latter two cases you also need to make sure smtp_port is correct for the server you use. There are some other, rarer and more complicated, possibilities, so if your answer is "none of the above", feel free to say so. But check those first, please. Steve _______________________________________________ Mailman-users mailing list -- mailman-users(a)mailman3.org To unsubscribe send an email to mailman-users-leave(a)mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/ _______________________________________________ Mailman-users mailing list -- mailman-users(a)mailman3.org To unsubscribe send an email to mailman-users-leave(a)mailman3.org https://lists.mailman3.org/mailman3/lists/mailman-users.mailman3.org/

5 years, 5 months

Search results for query "Cannot connect to SMTP server"