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SMTP Error 501


Syntax error in parameters or arguments

What does this mean?

This is similar to Error # 500, although this is specific to the additional 'parameters' or options that are being used.

How to fix SMTP Error 501

This is most commonly an issued with an incorrect/invalid email address, however can also be due to anti-spam filters as referenced in the similar Error # 500. If you've confirmed a correct email address, I suggest reviewing the fixes for Error # 500.

SMTP Error 501 Examples

  Remote host said: 501 Invalid Address

Similar SMTP Errors

email/troubleshooting/error-numbers/501.txt · Last modified: 2020/06/12 09:58 by Karson N.