Hi,

Off the top of my head:

Was the default authentication method changed between 1.3.1 and 1.4.9?

Was anything else upgraded, like postfix or whatever mail transfer you use?

There will be a corresponding error in the MTA logs, which hopefully shows the 
auth method used. Check this is the same in your RC conf?

Has the RC backend somehow changed? e.g mysql mysteriously got configured as 
sqlite?

Here is a quick RC google:
https://bobcares.com/blog/roundcube-smtp-error-250-authentication-failed/


Best of luck.

On 19 Oct 2020, at 7:50 pm, Denny Jones <[email protected]> wrote:


Hello,

After updating to 1.4.9 version from 1.3 I get an error when trying to send 
mail.

Here's the error I'm getting:

SMTP Error (250): Authentication failed.

Where do I start sleuthing on this?

Thank,
Denny

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