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SMTP Error 420

Category: Other
Tags: # # #
This error is only in relation to GroupWise servers.

Description: Timeout connection problem.

What does this mean?

This error has been provided by a GroupWise server, only the server administrators of the receiving mail server will be able to confirm the actual issue present. However, this is typically as a result of being blocked by the recipient’s firewall/filter or the server is experience a hardware issue.

How to fix SMTP Error 420?

Attempt contacting the administrator of the destination mail server for specifics on the exact reason for the error. This typically requires performing a WHOIS on the mail server.