<![CDATA[M2 smtp not work with office365 premium]]>Hello ,

Outgoing mails works fine way back couple years until my company annonunce all staffs are provided new "office365 preimum".

I can no longer sending mail since then no matter I create new mail account on IMAP or POP with below who send me from my companie's adminstrator. It just showing error messge box like below.

Hope if there is any solution.

Thank you very much., edmond

image001.png

Screenshot - 2_22_2022 , 8_57_07 AM.png

]]>https://forums.opera.com/topic/54311/m2-smtp-not-work-with-office365-premiumRSS for NodeMon, 16 Mar 2026 13:01:07 GMTTue, 22 Feb 2022 01:00:36 GMT60<![CDATA[Reply to M2 smtp not work with office365 premium on Tue, 22 Feb 2022 12:03:07 GMT]]>@burnout426 Thanks & works perfectly , problem solved.

Screenshot - 2_22_2022 , 7_50_25 PM.png

]]>https://forums.opera.com/post/275105https://forums.opera.com/post/275105Tue, 22 Feb 2022 12:03:07 GMT<![CDATA[Reply to M2 smtp not work with office365 premium on Tue, 22 Feb 2022 05:32:19 GMT]]>While Opera is closed, edit operaprefs.ini and add the following (or edit the section if it's already there).

[Security Prefs]
Enable TLS v1.0=0
Enable TLS v1.1=0

I don't know if that will be enough. Opera Mail should support TLS 1.2 like Opera 12 does. But, there could be something wrong.

If needed, you can explicitly turn on TLS 1.2 with:

Enable TLS v1.2=1

But again, that might not be enough. Even if Opera Mail supports TLS 1.2, there might be some cipher that Opera Mail doesn't support.

]]>https://forums.opera.com/post/275082https://forums.opera.com/post/275082Tue, 22 Feb 2022 05:32:19 GMT