This section contains troubleshooting information for the Mozilla Thunderbird client
Make sure Anti-virus scanning Outgoing email has been disabled.
Step 1: Verify Internet connectivity
Step 2: Verify account settings (POP / IMAP)
Step 3: Verify MX Records for the email domain (company.com) are pointed correctly
Step 4: Check with sender to see if they receive a bounceback message for possible cause of problem
Step 5: Verify that the correct email address is on the user account
Step 6: Check the Junk-Mail folder on the web application
Step 1: Check for cause of problem in the bounceback message
Step 2: Verify account settings (POP / IMAP)
Step 3: If message is stuck in the outbox, then try switching the outgoing port to 5125
Step 4: If still stuck move the messages to drafts folder and try to send a new one