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SMTP Response 221

Category: Other
Tags: # # #

Description: <SERVER> Service closing transmission channel

What does this mean?

This response is stating the the session or connection to the mail server is now ending. Suggesting that all processes have completed, this could be successful or due to failures.

SMTP Error 221 Examples

221 Closing connection
221 Goodbye

There is not a “fix” for this SMTP Response code, as it’s not specifically an error.