A user reported the following problem: "I can log in via the web portal, but I've tried my iPhone, o365 from my windows laptop, Yahoo mail client and they all won't let me connect via iMap or Pop. I'm using [mail.thedomain.com] as the in/out domain and the userID and passwords you provided. My iPhone tells me it won't support a non MD5 connection, but the rest just won't connect at all"

I can connect fine to the account through Thunderbird and Microsoft Mail. 

In the Administrative logs, I'm seeing the following IMAP errors for their IP:

[2024.02.03] 14:35:42.887 [user's IP] User info@thedomain.com calling get user app passwords for email , setupGuid: false isImpersonating: False
[2024.02.03] 14:36:15.074 [user's IP] User info@thedomain.com calling get ip access countries
[2024.02.03] 14:42:49.309 [user's IP] IMAP NTLM; AuthenticateMessage; Target name and hostname missing [TlRMTVNTUAADAAAAGAAYAEAAAAC+AL4AWAAAAAAAAAAWAQAACAAIABYBAAAWABYAHgEAAAAAAAAAAAAABYIIANKrT8piBg8nXb8o48pXeecMcUKaxfvJATcbwLCM5+hNsX8jyU24bDQBAQAAAAAAABBG74zhVtoBDHFCmsX7yQEAAAAAAgAWAFMATQBBAFIAVABFAFIATQBBAEkATAABAAgAVwBFAEIAMQAEABYAcwBtAGEAcgB0AGUAcgBtAGEAaQBsAAMAIABXAEUAQgAxAC4AcwBtAGEAcgB0AGUAcgBtAGEAaQBsAAUAFgBzAG0AYQByAHQAZQByAG0AYQBpAGwABwAIADRf64zhVtoBAAAAAAAAAABpAG4AZgBvAFcATwBSAEsAUwBUAEEAVABJAE8ATgA=]
[2024.02.03] 14:42:49.309 [user's IP] IMAP NtlmAuthenticate Login failed: NTLM; AuthenticateMessage; Target name and hostname missing.
[2024.02.03] 14:42:55.059 [user's IP] IMAP NTLM; AuthenticateMessage; Target name and hostname missing [TlRMTVNTUAADAAAAGAAYAEAAAAC+AL4AWAAAAAAAAAAWAQAACAAIABYBAAAWABYAHgEAAAAAAAAAAAAABYIIAONekaFbO1is2hD7o+u13VLAGf7G1tI5yzNQWqD2sk3muDnJe3brJScBAQAAAAAAAJB5W5DhVtoBwBn+xtbSOcsAAAAAAgAWAFMATQBBAFIAVABFAFIATQBBAEkATAABAAgAVwBFAEIAMQAEABYAcwBtAGEAcgB0AGUAcgBtAGEAaQBsAAMAIABXAEUAQgAxAC4AcwBtAGEAcgB0AGUAcgBtAGEAaQBsAAUAFgBzAG0AYQByAHQAZQByAG0AYQBpAGwABwAIAF9sWJDhVtoBAAAAAAAAAABpAG4AZgBvAFcATwBSAEsAUwBUAEEAVABJAE8ATgA=]
[2024.02.03] 14:42:55.059 [user's IP] IMAP NtlmAuthenticate False IDS counting for NTLM failures over IMAP at this IP is throttled.

Any thoughts on what the problem is