Thunderbird login to server smtp.office365.com failed

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Nov 29, 2016 · A companion guide to configuring and deploying your Office 365 Hybrid with step by steps including screenshot.

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Thunderbird will then attempt to locate the correct settings for the email account. However these will be incorrect and you will need to select Manual config. To ensure that you send from your new account please navigate to Outgoing Server (SMTP) and select the new SMTP account, which will have the...

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Oct 19, 2014 · 1) Close your mail client (i.e. Apple Mail, Thunderbird, Outlook, etc). 2) Launch "Applications" > "Utilities" > "Keychain Access.app" 3) Select "login" from the sidebar top left area, then select "Passwords" in lower left area. 4) Click into the Search box in the upper right and search for your ISPs server names.

So the issue is not with the plugin itself, but with server/account settings. Viewing 1 replies (of 1 total) The topic ‘Cannot send test mail, SMTP Error: data not accepted’ is closed to new replies. Hello fellow SMTP'ers - a note that the upgrade from 4.3.3 to 4.3.4 may fail for you. I received the following error that stopped the upgrade (upgrade process tries to send an email that the database has been backed up)