Gmail IMAP

Gmail SMTP and IMAP Settings

SMTP:
smtp.gmail.com
port 587
TLS, if available

IMAP:
imap.gmail.com
port 993
SSL
No secure authentication

Correct trash folder and better reply header

Edit -> Preferences -> Advanced -> Config Editor

mail.server.server2.trash_folder_name = [Gmail]/Trash
mailnews.reply_header_type = 2

source: http://andreineculau.wordpress.com/2007/10/28/gmail-imap-on-thunderbird/

No-ip SMTP Settings

smtp-auth.no-ip.com
username: <domain>@noip-smtp
port 3325
SSL