Email connection failures

email

#1

For the last couple days my MS Outlook connections to the sub4 e-mail server for IMAP have been randomly failing. They’ll fail for a while then suddenly all connect up, repeat the pattern…

I’m not having any problem with net connectivity or connecting to any other mail servers.

What’s up?


#2

I’m also having trouble with sub4. When on webmail, I get intermittent “login failed - username or password incorrect” errors, and outlook doesn’t show errors but takes 10-15 minutes to show new emails. Meaning an email sent at 4:45PM will appear in outlook at about 5, but outlook lists the arrival time as 4:45 or 4:46


#3

Um, only two of us?
Is this something on our client side or is there a server issue?
Are we polling too frequently? (was every 10 minutes here to several domains on sub4)

I just made a change in Outlook: I created a new account group and set it to poll every 30 minutes. Within seconds it received email from two different domains that’s dated 5-10 days old. I’ve removed these domains from the 10 minute poll cycle and from immediate send/receive requests. If I get the error again, with three domains, total five accounts being polled, I’ll further stagger the polling to avoid what could be an issue with simultaneous hits from a single client.

@acadams I recommend you try the same and see if you get the same result.


#4

I was certainly polling frequently while testing the issue. But I’ve polled POP servers frequently without such issues since the early 90’s. I wonder if that server is overloaded or if they’re deprioritizing SMTP transport and POP polling?

Andrew


#5

I’m not getting any errors since changing my polling frequency. So far that’s my working theory. But the server error doesn’t agree and I haven’t seen any DH notes on that topic.


#6

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