![]() ![]() > Authentication failed because Outlook doesn't support any of the available authentication methods.Īgain, the settings are identical to the working settings in Thunderbird except for the fact that I can't explicit declare the encryption type. Support for them in our data migration and sync products stopped on December 31, 2018. If you are a user of the Outlook app on your Windows computer or Mac, you may also be a. Windows XP Windows Server 2003: Microsoft no longer supports these versions. Windows 10 Mail App comes with a built-in mail client support. If I try to send mail from the account this is the error I get: macOS: Microsoft Outlook for Mac doesnt support the Messaging Application Programming Interface (MAPI), which GWSMO needs to communicate with Outlook. ![]() It appears from examples that I can find that this explicit declaration is also possible in the Windows version. In Thunderbird I can specify the encryption type for outgoingĮxplicitly while in the Outlook Mac client I don't have this ability. I have ruled out server config issues as I am able to get Thunderbird to send mail successfully (sending is the only problem). The mail server is self-hosted with Dovecot handling IMAP connections. I came to the conclusion that STARTTLS wasn't supported based on some other user experiences scattered across the internet, but they are few and far between and all of them seem to be with people running their own mail server.
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