SMTP Error 432
Description: Recipients Exchange Server incoming mail queue stopped.
What does this mean?
Like almost all Microsoft Errors, the description doesn’t give you much. It’s typically due to a connection problem, however the only way to confirm the issue will be to contact the server administrators.
How to fix SMTP Error 432?
Unfortunately, with out knowing the exact issue, resolving this can be quite difficult. It requires contacting the server administrator to determine the reason for the error. Perform a WHOIS for the destination mail server to get contact information.