[Users] recently occurring problems sending thru SMTP

[Paul]

Hello Raif,

Are you able to send a message if you don't save it to the Sent folder?

In the Compose window go to the Other tab and uncheck 'Save message to'.

If that now allows you to send, then open the Account preferences, go to the
Advanced page and activate and configure the options 'Put sent  messages in
...' and 'Put queued messages in ...'. Use the Browse buttons to select your
folders.

Right-click your account's Sent folder, choose Properties, and check that the
Folder Type is set to 'Sent'.

Right-click your account's Queue folder, choose Properties, and check that
the Folder Type is set to 'Queue'.

Let us know about the above.

regards

Paul