Thundebird

[Maxcondor]

Hello,
I use avast premium security.
When I send an email with thunderbird I get an error on the smtp server.
If you turn off the antivirus protection and reactivate it immediately, the mail message is sent.
Why does it happen?

Thanks for your attention

[Asyn]

- Which version of APS..?
- OS..? (32/64 Bit..? - which SP/Build..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
- Which version of Thunderbird..?