IMAP Auth for O365?

[JJedrasik]

Describe the bug
I've been trying to configure the emailer through an office365 account, but regularly just get
ERRO[2023-09-07T22:26:32Z] Error reaching mailserver Error="LOGIN failed." Server="outlook.office365.com:993"

My mail profile seems fine, and the login works otherwise:

[[Profile]]
  IgnoreDefaults = false
  [Profile.Mail]
  ImapServer = "outlook.office365.com:993"
  Username = "my@outlook.com"
  Password = "myPass"
  ReadOnly = true
  ImapTLS = false
  StartTLS = true
  GenerateLocalUIDs = false

I read that MS turned off basic auth for IMAP recently, could this be the reason? Anyone have any luck with this?

[c-seeger]

Hi @JJedrasik "Login failed." is the message returned by outlooks mailserver so it looks like your username or password is not matching. Please check again. Your configuration looks fine.

[LTech-Corey]

@JJedrasik Have you had any luck with this? I'm running into the same issue with known working credentials

[c-seeger]

Sorry for the long reply time will check once i have some time

[LTech-Corey]

I did some digging in the interim, it looks like IMAP with 365 must use the OAuth flow now: https://techcommunity.microsoft.com/t5/exchange-team-blog/exchange-online-email-applications-stopped-signing-in-or-keep/ba-p/3641943

Hope this helps!

[JJedrasik]

This is the only lead I've been able to find - in that basic auth IMAP doesn't work anymore - haven't been able to get it configured though. Did you manage to get it working @LTech-Corey ?

[LTech-Corey]

Unfortunately not. It seems like a limitation of this software for now, hopefully an update to support OAuth is something the contributors are willing to do!

[juangps96]

Hi @JJedrasik / @c-seeger Did you find a solution?

In Office 365 Mail, is it possible to use a regular password or is an application password required?

[DefaultProfile.Mail]
ImapServer = "mail.office365group.com"
ImapPort = 993
Username = "email@office365group.com"
Password = "only-app-password" or normal password is possible?

[JJedrasik]

Nope

[rara010]

Hi, just wanted to ask - is this feature planned, or it wont be possible to use Mail2Most with O365 mailboxes? Thank you