“I use Thunderbird on my PC with Outlook on UVM servers. After a password change, I can receive but not send email. What do I need to fix? I’d prefer not to switch to Outlook as my interface. Thanks. –Turner”
I am an emeritus professor using the UVM email account X@uvm.edu<mailto:X@uvm.edu>, which I have used for many years. I use Mozilla Thunderbird (current version, “Eclipse”) as my email client and my account is configured for UVM’s Microsoft 365/Exchange Online service. After my most recent required yearly password change, although I can still receive email in Thunderbird, I can no longer send email. When I attempt to send a message, I consistently see this error: “Login to account ‘smtp.office365.com’ failed. Login to server smtp.office365.com with username tosler@uvm.edu<mailto:X@uvm.edu> failed.” Here are my current settings:
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Incoming (IMAP):
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Server: outlook.office365.com
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Port: 993
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Connection security: SSL/TLS
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Authentication method: OAuth2
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Username: tosler@uvm.edu
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Outgoing (SMTP):
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Server: smtp.office365.com (I have also tested smtp.uvm.edu with the same result)
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Port: 587
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Connection security: STARTTLS
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Authentication method: OAuth2
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Username: X@uvm.edu
I have reinstalled Thunderbird, and I have removed all saved passwords and tokens for outlook.office365.com and smtp.office365.com, restarted the program, and completed the Microsoft/UVM sign‑in prompt again. IMAP continues to work and mail arrives normally, but SMTP authentication still fails with the error above. Because:
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The configuration matches Microsoft 365/Exchange Online client‑submission settings, and
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IMAP with OAuth2 works, while SMTP with OAuth2 fails,
it appears that this may be a server‑side policy or mailbox setting, rather than a client configuration problem. What are my options? Does the University of Vermont have to change some setting on their end on my behalf? Thanks. -turner
(PII redacted by moderator)
Ed மூலமாக திருத்தப்பட்டது
All Replies (1)
What version of Thunderbird you using? and more importantly has your university admin disabled the use of SMTP to send mail. It has been deprecated by Microsoft and many exchange admins have disallowed to use of SMTP, Micrisift told them is was safer without it and given most admins these days know nothing about computers that Microsoft did not publish they do not even question a Microsoft white paper or TCO statement. My understanding is the new exchange support in V148 allows sending using EWS, hence my asking what version). But I have no experience with either EWS or the newer release versions so all I can do is suggest.
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