Windows Plesk Mail thunderbird client Issue

[ChiragP]

I have installed windows plesk control panel on windows server 2008.
Now i am facing one serious issue in mail server.

I have created domain for my client & make all require entry in dns.
In domain everything working fine. FTP, Website & mail.

I can able to work with outlook express, opera mail, Eudora, MS Outlook in all this clients mail server repond properly.
but when i am using Mozilla Thunderbird as mail client.

in Mozilla getting SMTP response : Bad Request of command error when trying to send mail to any domain.

Kindly provide suggestion what steps i need to do for this...