AOL Mail Problem

Suresh Ramasubramanian ops.lists at
Thu Jul 27 12:38:04 UTC 2006

What you have run into is called AOL's "second received line" filtering

If your adsl customer is infected, or someone who had that IP recently
[if a dynamic IP] is infected and his PC is originating spam and
malware .. AOL will block any email with that infected IP in the

Simple reason for this .. a lot of malware is getting quite good at
hijacking Outlook or other MUA on a user's PC [including smtp auth
credentials if any] and sending out spam through the ISP's mail

Please sign your IP space for a feedback loop from aol -


On 7/27/06, Tom Quilling <tier1 at> wrote:
> We are an ISP in Germany and experience since this morning, July 27 07:00
> GMT problems with all mail-in Servers at AOL.
> They seem to refuse mailconnections, giving error message 554 for no reason
> at all, since our servers are not listed in any RBL etc..
> We can see, that they extract from the header the original sender IP of a
> mail, instead of the one from the MAIL-RELAY-SERVER, as specified in RFC.
> As these senders are from ADSL IP's, AOL refuses them.
> This is definitely wrong by AOL...
> Does anybody else experience this Problem..

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