Problems with email using The Bat mail client

Hello

Sorry if I wrote in wrong section.
I have problems with sending email via mail client The Bat.
Send via Webmail was successful
E-mails goes, but does not come to the addressee.
However, I do not receive emails from Mailer-Daemon, who will report an error in sending.
All the default settings have the correct (checked many times)
Perhaps there is some particular settings for The Bat mail client?

Thanks a lot for answers