IP blacklisted – but I’m confused!

IP Address Questions and Answers › Category: Questions › IP blacklisted – but I’m confused!
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Kirsty McAllister asked 1 year ago

Help!
I have a customer who is not receiving my emails - they are returned with an error message:

Diagnostic-Code: smtp; 451 too many errors detected from your IP
    (#######), please visit

BUT ####### is different each time, and also is not the address I get when I check on this site. I'm confused!

3 Answers
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wimiadmin Staff answered 1 year ago

Are you having problems sending email to others on the same system? Try sending to someone on a different system. If other emails go through, it's something specific to this customer. However, if other emails don't go through, there's possibly something wrong with your email server.

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Kirsty McAllister answered 1 year ago

It's only with this one recipient, with a .free.fr email (don't think I've ever sent an email to that internet provider before)

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wimiadmin Staff answered 1 year ago

Sounds like something at free.fr has you blocked. You can reach out to their support. I'm sure they'll be able to help clear the error.

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