Hello there Daunte. We have read your message

We try to help you.

It seems that connection to the relevant program is not successful.

This gives a pop up that it does not go further to where you want to connect in this case g.mail.stmp

(Look for programs that block. Antivirus etc.)

The computer breaks the connection to the server.

http://kb.mozillazine.org/Gmail

https://support.mozilla.org/en-US/kb/cannot-send-messages Read this article please.

Greetings Firefox Volunteer.

Hello there Daunte.

you have probably changed the server settings. try to achieve this in Thunderbird and set it again properly.

https://support.mozilla.org/en-US/kb/cannot-send-messages.

Your outgoing mail will not incur anything further and is not infected. Use a good antivirus on these topics.

Greetings Firefox Volunteer.