AOL blocking MailScanner messages!

Daniel Bird dbird at SGHMS.AC.UK
Tue Dec 2 21:31:54 GMT 2003

Desai, Jason wrote:

>Does your site-name have any weird characters in it?  Maybe an underscore or
>something else?  They could be blocking email based on what they thing is an
>invalid header.
nope, just MH then 1 thru 4.


>>-----Original Message-----
>>From: Daniel Bird [mailto:dbird at SGHMS.AC.UK]
>>Sent: Tuesday, December 02, 2003 2:30 PM
>>Subject: [MAILSCANNER] AOL blocking MailScanner messages!
>>Dear all,
>>Apologies for the shock subject line, but it seems to be the case (at
>>least for our site;-).
>>Recently, we started seeing messages like:
>>2003-12-02 16:09:43 1ARD5c-0002Sm-Rm ** ****** <*****>
>>R=dnslookup T=remote_smtp: SMTP error from remote mailer after end of
>>data: host []: 554
>>554 AOL will not accept delivery of this message
>>in our Exim mail logs
>>After numerous emails to postmaster at (all replys were automated
>>"sorry for the inconvenience", "read this/that policy" types)
>>I ended up
>>calling them (at international rates I might add!!!).
>>The 'helpful' gentleman on the end of the phone suggested turning off
>>any scanning software and retrying. Now, all I did was add the line
>>To:    *    no
>>to /etc/MailScanner/rules/virus.scanning.rules
>>and restart.
>>After this change all was well and delivery started. The only
>>differences I can think of between the two emails that would have been
>>sent would be the omission of the X-MailScanner headers (apart from
>>X-MailScanner-<site-name>: not scanned,etc )and a MailScanner
>>Looking at the error message they are rejecting on data content after
>>the initial SMTP connection so this makes me think (a hunch) they are
>>rejecting on X-MailScanner-xxxx : Found to be clean or other
>>headers. (Sobig.F springs to mind!)
>>Has anyone else noticed this behavior from AOL on their MTA?
>>I have opened a ticket with their postmaster team to see if I
>>can verify
>>the above assumptions. In the mean time I've left the virus
>>scanning off
>>for AOL recipients.
>>Additionally, if they are blocking on
>>"X-MailScanner-<site-name>: Found
>>to be clean" I am wondering if it would be possible to customize the
>>"found to be clean message" as this would be the value in the
>>MailScanner headers from my 4 mail hubs that would be consistent.
>>This message has been scanned for viruses and
>>dangerous content by MailScanner, and is
>>believed to be clean.

This message has been scanned for viruses and
dangerous content by MailScanner, and is
believed to be clean.

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