Forum OpenACS Q&A: Re: Email with 511 Blocked

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4: Re: Email with 511 Blocked (response to 1)
Posted by Chris Davies on
For some reason your IP is in a blacklist that the server you are sending to is using.

If you're not on a dialup account, you could find the blacklist that the system admin is using, and write to the people that maintain the blocklist he is using.

Short of that, you could send through another SMTP server by setting up a transport map for that particular site.