SMTP Authentication failed with some passwords containing accented characters
Problem reported by Antoine Temime - January 8 at 4:14 AM
Resolved
Hi everybody,
We recently updated our smartermail server from version16.3.6508 (Oct 26, 2017) to version 16.3.6572 (Dec 29, 2017).
Since then, some users are not able to send mail via SMTP anymore. Authentication via POP and IMAP works just fine but when sending mail, a SMTP error 535 authentication failed is logged.
It seems that it is related to the presence of accented characters (like é)  in the user password. We made some tests with several connection parameters to the smtp server, and all are rejected.
I used WireShark to analyse the SMTP traffic of an unencrypted connection dialog and the base 64 encoded password is transmitted correctly, though it is rejected. Changing the user password to a non accented password fix the bug, so it doesn't seem to be user account related.
 
Does anyone else have encountered similar issues? Or is it a bug of this release?
Note: we have updated to last version 16.3.6579 (Jan 5, 2018) but this doesn't clear the issue.
 
Thanks for your support.
 
Best regards,
 
Grégory Brunel
Arts et Vie
 

3 Replies

Reply to Thread
0
Rod Lasky Replied
Employee Post
Hi Grégory.  I'm seeing this behavior as well.  I'll get this over to be fixed.  Thanks!
Rod Lasky
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278
www.smartertools.com
0
Antoine Temime Replied
Hi. Thanks you for letting me know! Have a good day.
0
Rod Lasky Replied
Employee Post
This fix will be included in tomorrow's minor release of SmarterMail 16.
Rod Lasky
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278
www.smartertools.com

Reply to Thread