After clicking on "Send", mozilla stops.
Can you provide a bit more information? See http://www.mozilla.org/quality/bug-writing-guidelines.html. Build used? What are your prefs? Does your SMTP server require authentication? When you say it doesn't work, do you get an error message? Is this a new profile you created or a profile you migrated from Communicator 4.x? We'd like to help, but need more info first. Thanks.
I'm using M14 on Win98. I've created a new profile. I don't know if my SMTP-Server needs authentication. It is "mx.01019freenet.de". There comes no error message. The composing window merges with the Mail Window. I must end it with <CTRL>+<ALT>+<DEL> and "End Task"
I've found nearly the same bug and it's fixed! Now it works ... nearly fine but I must close the sending window by myself! ... It's ok, but perhaps it will be fixed some day!
Marking verified. OK with 04-21 m16 commercial build NT 4.0