[PLUG] SMTP Error Code Meaning

Rich Shepard rshepard at appl-ecosys.com
Fri Dec 11 16:26:17 UTC 2015


   Some e-mail messages bounce with the code 554 5.7.1 <username at domain.tle>:
Recipient address rejected: 300

   I've recently successfully sent messages to these recipients and suspect
this error is due to some issue at the domains' mail servers.

   A web search turns up a couple of examples of Recipient address rejected,
but with text and not with '300.'

   Where can I find an explanation of this particular error message?

TIA,

Rich







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