Roundcubemail: SMTP Error: Authentication failure: SMTP server does not support authentication

[madcreativebg]

Hello,

I get the error when trying to send mail:

when using Roundcube 1.4.1. With Roundcube 1.3.10 on the same server and settings there is no problem.

[alecpl]

Some config defaults changed in 1.4. See #7011. Because smtp_pass/smtp_user is now set and your server does not allow authentication over insecure channel, you have to either disable authentication (clearing smtp_pass/smtp_user) or add tls:// prefix to smtp_server.

[johnnyutahh]

... you have to either disable authentication (clearing smtp_pass/smtp_user)...

For me, "clearing" the variables means the following (assigning said variables to null does not seem to work in my Roundcube 1.4.3 rig):

$config['smtp_user'] = '';
$config['smtp_pass'] = '';

(This might be obvious to most Roundcube admins, but I'm a newbie.)

[trasherdk]

It could also mean to comment out those 2 lines. Did you try that?

[johnnyutahh]

Thanks. I just did. Commenting out the above lines in /etc/roundcube/config.inc.php does not work. (The SMTP auth fails when attempting to send an email.) Setting the variables = '' (an empty string) seems to be the only way to do make an SMTP-server-with-no-auth work (to send an email).

So there seems to be 3 different ways one can interpret "clearing" a variable, depending on the context:

1. set variable to empty string
2. set variable to null
3. comment out the variable (although said variable could be defined in another area)

If there's enough confusion in the Roundcube community about this, would it be helpful to clarify things surrounding "clearing a variable"?

[RichyT]

I have an SMTP server with no auth for the local subnet. I came here because although I unclicked "Use the current IMAP username and password for SMTP authentication", it wasn't clear that I had to delete the %u and %p to not use them and I was getting SMTP auth failures. Not to step on toes but I would suggest this could be cleaned up a little as it's a bit ambiguous.

(Edit: To be clear, it's all working fine now though 👍)