It's saying you're blacklisted. If you're running a mailer in promiscuous mode, and the fact can be detected from the outside, a fair number of mail-admin hosts will automatically blacklist you. Conversely, if you subscribe to an ISP that spammers operate from, your entire ISP's block of addresses may be blacklisted. Bear On Fri, 12 Oct 2001, elfed lewis wrote:
I got this message today (names have been changed to protect the innocent!). Is it saying i'm blacklisted, or the host i'm emailing to is blacklisted?
----------email-------------------
from localhost
� �----- The following addresses had permanent fatal errors ----- (email i'm mailing to) � � (expanded from: (their local alias name))
� �----- Transcript of session follows ----- ... while talking to mail-in.pol.net.uk.:(email i'm mailing to)
�RCPT To:
<<<�550- <<<�550 mail from (my emailer ip address) rejected: administrative prohibition (host is blacklisted) 550 (email i'm mailing to)... User unknown
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