Over the last several months we have seen what seems like large delays in email delivery as well, we get emails at 11AM that are time stamped at 9:10. I thought it was a networking issue, but I can’t be sure. I wish I knew more about coding, to look under the hood to examine things further.

Sent from my iPhone

On Oct 23, 2022, at 7:17 AM, Voytek Eymont <voytek@sbt.net.au> wrote:



...

On Sat, October 22, 2022 11:29 am, Joseph Tam wrote:

I haven't seen anyone else replying, but there doesn't seem anything anomalous with the output. The session commands-repliesd is is more or less what I expect, although to make sense of this, you'll have to splice the input and output files together using timestamps to see the sequential flow of data. ... Typically, if some resource limit is hit, one side or the other will create a log or notification. Your INBOX is large, but not outrageous. You can test it directly by creating smaller subsets of the INBOX messages and see if the problem goes away.

Joseph,

thank you very much for the follow up! you won't believe it, literally minutes before your email I got this email from the 'problem user' (below)

thank you to all who responded!

• I guess if TB debug log was enabled (as was suggested)- maybe the issue would become apparent from TB debug log ?

• I guess i should encourage POP users to switch to IMAP anyhow ?

got this from problem user:

Mozilla Thunderbird released an update which I just installed.

Problem solved.

I guess Tbird had a problem that the new release addressed.

I'm sorry for the inconvenience.

I'm mystified why my issue was only with one account. Perhaps it was something to do with the size of the database.

---

yesterday it was

I'm still experiencing a 40 second delay to retrieve emails for xxx

I have changed the pop port to 110 for the server but that did not work at all.

I have reinstalled my email client TBird but no change, anyway all the other accounts on TBird are working ok but they are MAPI not POP.

Voytek

Even more easy, start by examining the mail headers to see where the mail was blocked.

Jhp

On October 23, 2022 4:05:51 PM GMT+02:00, Aki Tuomi <aki.tuomi@open-xchange.com> wrote:

Hi!

This is very unlikely to be a dovecot issue itself. There is nothing inside dovecot that would horde your emails for 2 hours before "delivering" them.

You should

• Enable mail_log plugin. This will tell you when mails are delivered, when deleted etc, see https://doc.dovecot.org/configuration_manual/plugins/mail_event_logging
• Examine your logs
• Check doveadm fetch 'date.received date.sent date.saved' mailbox INBOX '*' ( this will print you the last email in INBOX, note the quotes)

Aki

...

On 23/10/2022 16:49 EEST Chris Wensink <cwensink@five-star-plastics.com> wrote:

Over the last several months we have seen what seems like large delays in email delivery as well, we get emails at 11AM that are time stamped at 9:10. I thought it was a networking issue, but I can’t be sure. I wish I knew more about coding, to look under the hood to examine things further.

Sent from my iPhone

...

On Oct 23, 2022, at 7:17 AM, Voytek Eymont <voytek@sbt.net.au> wrote:



...

On Sat, October 22, 2022 11:29 am, Joseph Tam wrote:

I haven't seen anyone else replying, but there doesn't seem anything anomalous with the output. The session commands-repliesd is is more or less what I expect, although to make sense of this, you'll have to splice the input and output files together using timestamps to see the sequential flow of data. ... Typically, if some resource limit is hit, one side or the other will create a log or notification. Your INBOX is large, but not outrageous. You can test it directly by creating smaller subsets of the INBOX messages and see if the problem goes away.

Joseph,

thank you very much for the follow up! you won't believe it, literally minutes before your email I got this email from the 'problem user' (below)

thank you to all who responded!

• I guess if TB debug log was enabled (as was suggested)- maybe the issue would become apparent from TB debug log ?

• I guess i should encourage POP users to switch to IMAP anyhow ?

got this from problem user:

Mozilla Thunderbird released an update which I just installed.

Problem solved.

I guess Tbird had a problem that the new release addressed.

I'm sorry for the inconvenience.

I'm mystified why my issue was only with one account. Perhaps it was something to do with the size of the database.

---

yesterday it was

I'm still experiencing a 40 second delay to retrieve emails for xxx

I have changed the pop port to 110 for the server but that did not work at all.

I have reinstalled my email client TBird but no change, anyway all the other accounts on TBird are working ok but they are MAPI not POP.

Voytek

-- Sent from my Android device with K-9 Mail. Please excuse my brevity.