Forum Discussion

Copper Contributor

Oct 18, 2018

imap service in office 365

Is anyone else seeing delays/ timeout with the Office365 Imap service making it almost impossible to use. I have raised a support call and been told they cant help as the email client is evolution an...

exchange

office 365

David Rich

Copper Contributor

Oct 19, 2018

Talking with our software developers who are having the problem run Linux and use Evolution and Thunderbird as their mail clients. The issue is with connecting to MS IMAP service and reading the email, lengthy delays and random disconnects. At the same time they also experienced issue with sending email via the smtp.office365.com. Attempting to connect with openssl s_client they can see the server banner with virtually zero latency, the issues seems to be after the STARTTLS handshake. We have temporary overcome the sending issue by relaying their outbound email via our hybrid on premise CAS server.

Martijn Steffens

Iron Contributor

Dec 07, 2018

Hi David Rich one of our customers is also experiencing issue's with IMAP connections in Office 365.
User x can succesful perform the https://testconnectivity.microsoft.com IMAP test. User Y can't. Same setup, same license. No differences between accounts. But, the IMAP feature does not work for user Y.
I had the issue myself as well. After disabling my Microsoft MFA, the IMAP issue is gone. Test worked.
But the customer is not using Microsoft MFA. I've got a support ticket with Microsoft, if i have news, i will share it with you.

Regards, Martijn