Email and mailing lists
The email and the mailing list services are administered by the central IT Division
"Error 12" message in Thunderbird:
Thunderbird tries to send some information that the mail server does not understand, even though it is part of the protocol standard. You can configure Thunderbird to skip sending this information:
- Under menu "Tools" choose "Options" -> "Advanced"
- Choose the tab "General" (still under "Advanced").
- Click on "Config Editor".
- Look for "mail.server.default.send_client_info". This is default marked as "True". Double click on it and change to "False".