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http://forums.mozillazine.org/viewtopic.php?f=28&t=1858105
Apr 19, 2010 · It does not support authentication (SMTP-AUTH) but you have chosen to use authentication. Uncheck 'Use name and password' for that server or contact your service provider." Because I had deleted and set up the account again, I immediately suspected that I had an option set up that the ISP couldn't handle.
https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook-mso_windows8/outlook-imap-not-working/71025bcd-ca03-44b8-be92-fa94c4df2d2d
Sep 15, 2017 · Outlook IMAP not working ... Log onto incoming mail server (IMAP): General authentication failed. None of the authentication methods supported by your IMAP server (if any) are supported on this computer. ... Send test e-mail message: Your server does not support the connection encryption type you have specified. Try changing the encryption ...
https://www.howtoforge.com/community/threads/smtp-auth-failure-server-does-not-support-secure-authentication.6738/
Sep 12, 2006 · Just for fun, I specified mynetworks_style = host, and authentication from my lan (on the same subnet) failed. So, I guess it isn't authenticating at all, but was allowing relaying because the machines are on the same sbunet. And nothing at all is added to the log when I get the message "Mail server does not support secure authentication".
https://discussions.apple.com/thread/2718151
Jan 14, 2011 · My POP email accounts on Hosting.365.ie do not use a password to authenticate outgoing mail. They rely on a prior authenticated download to enable the outgoing mail server. On my MacBook Pro there is an option in the SMTP server settings under authentication for "none' and all my accounts work perfectly on the MacBook.
https://www.3cx.com/community/threads/the-smtp-server-does-not-support-authentication.58684/
Aug 17, 2018 · I could not make it work again, so I tried to fall back to the 3CX SMTP server, but this gives the same error: "The SMTP server does not support authentication." even as Outlook.com and Gmail (also tried as Custom SMTP server). After all my tests I restarted the 3CX services (and sometimes a reboot of the machine)
https://androidforums.com/threads/problems-setting-up-pop3-email-facility.449617/
May 27, 2013 · I've religiously followed the instructions & the Incoming settings are accepted but when I put in the Outgoing details it always comes up with "Your outgoing server does not support authentication. Please verify your outgoing server settings". I am not a computer/phone expert but managed to set up my BlackBerry without any problem.
https://support.microsoft.com/en-us/help/3183972/authentication-fails-when-you-use-an-imap-server-in-outlook-2016
May 20, 2019 · Authentication fails when you use an IMAP server in Outlook 2016. Content provided by Microsoft. ... Enter your Incoming mail server and Outgoing mail server (SMTP) details, enter your logon information, ... If possible, use Outlook 2013 instead of Outlook 2016 to connect to your IMAP account. This issue does not occur in Outlook 2013. Status.
https://talk.plesk.com/threads/smtp-authentication-not-working-does-not-support-authentication.84656/
Apr 13, 2010 · SMTP Authentication Not Working - Does Not Support Authentication Discussion in ' Plesk for Linux - 8.x and Older ' started by Superman859 , Oct 23, 2008 . Superman859 Guest
https://forum.netgate.com/topic/65163/cannot-send-mails-using-office365-smtp-server
Cannot send mails using office365 smtp server. ... seems to support several Authentication mechanisms for SMTP (at least that's what I gathered from the various files), but it ALWAYS uses "PLAIN". If the E-Mail-Server does not support "PLAIN", E-Mail-Notifications will fail - typically with "Authentication mechanism not supported". ...
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