Searching for Authentication Failure Smtp Server Does Not Support Authentication Roundcube information? Find all needed info by using official links provided below.
https://foursixnine.io/blog/2019/09/27/Roundcube-smtp-(250)-authentication-failed.html
You have tried everything, but still can’t seem to be able to send email from roundcube, you keep getting this annoying “SMTP (250) authentication failed” notification, every time you click “Send”. Well… Make sure that your server is connecting to the right place.
https://github.com/roundcube/roundcubemail/issues/3944
Sep 24, 2012 · Reported by mv on 24 Sep 2012 07:37 UTC as Trac ticket #1488719 The current roundcube (0.8.1) seems to be unable to send email via SMTP servers that do not support authentication. ... SMTP server without auth support #3944. Closed rcubetrac opened this issue Sep 24, 2012 · 3 comments ... 10:38:36 +0200: SMTP Error: SMTP error: Authentication ...
https://forums.cpanel.net/threads/problem-with-roundcube-sending-smtp-error-authentication-failure-starttls-failed.106101/page-3
Jan 11, 2010 · For reference please see the following thread that details the specific situation: Problem with Roundcube (sending) SMTP error: Authentication failure: STARTTLS failed - cPanel Forums Note: I will merge the two threads as they pertain to the same issue in Roundcube.
https://talk.plesk.com/threads/roundcube-problem.339471/
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https://bbs.archlinux.org/viewtopic.php?id=111392
Jan 12, 2011 · Based on the comments in the config regarding the smtp_user and smtp_pass variables, and since you aren't using smtp authentication (you are using mynetworks ip based ACL), you should look for a way to disable smtp auth in roundcube.
https://www.howtoforge.com/community/threads/cannot-send-emails-via-roundcube.79413/
Jun 29, 2018 · On localhost, smtp auth is not required, but it does not matter if you use it as you can use smtp-auth on localhost but you don't have to. So I can only guess that an other change that you made to your setup must cause the issue on your server.
https://support.desk.com/customer/en/portal/articles/983029-smtp-and-imap-authentication-errors
What is authentication? When you use email in Desk.com, IMAP or SMTP is used to send or receive the email. Communication is opened between the Desk.com servers and your mail server, and Usernames and Passwords are used to authenticate the user. All IMAP servers require authentication, but some SMTP mail servers do not require authentication.
https://forum.iredmail.org/topic3755-iredmail-support-problem-with-roundcube-when-tls-in-postfix-is-turned-on.html
Aug 03, 2012 · Problem with roundcube when TLS in postfix is turned on (Page 1) — iRedMail Support — iRedMail — Works on Red Hat Enterprise Linux, CentOS, Debian, Ubuntu, FreeBSD, OpenBSD
https://github.com/roundcube/roundcubemail/issues/5965
Sep 25, 2017 · The IP is not really clear. The webmailer should be used either from Intranet with 192.168.1.x and via Dynamic IP from outside. I tried both: Setting localhost, and DynDNS Name.
https://support.plesk.com/hc/en-us/articles/213360809-Sending-messages-from-webmail-fails-SMTP-Error-250-Authentication-failed
Symptoms. Rouncube shows error: CONFIG_TEXT: SMTP Error (250): Authentication failed. Checking server externally with telnet is not showing the AUTH option at all to ...
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