>Len,
>
> Do you send an email to the people whose email was blocked because of an
>attachment.
IMGate rejects the msg at the SMTP dialog level, here's the SMTP session
transcript:
Transcript of session follows.
Out: 220 mgw1.MEIway.com - ESMTP - Postfix Relay Hub - ATTN: UCE trespassers
will be pursued.
In: EHLO mail.anngel.com
Out: 250-mgw1.MEIway.com
Out: 250-PIPELINING
Out: 250-SIZE 40000000
Out: 250-ETRN
Out: 250 8BITMIME
In: MAIL From:<[EMAIL PROTECTED]> SIZE=82659 BODY=8BITMIME
Out: 250 Ok
In: RCPT To:<[EMAIL PROTECTED]>
Out: 250 Ok
In: DATA
Out: 354 End data with <CR><LF>.<CR><LF>
Out: 552 Error: content rejected
In: QUIT
Out: 221 Bye
---------------------------------------------
So their mail server "should" inform the sender of the delivery
failure. The above case is the rejection due to regex filtering of headers
or body+attachment. That particular routine in postfix doesn't allow, now,
for your own text. (you can always modify the source yourself, and
somebody in the IMGate list has done just that)
here's session for RLB reject:
Out: 220 mgw1.MEIway.com - ESMTP - Postfix Relay Hub - ATTN: UCE trespassers
will be pursued.
In: EHLO mail.gehua.com
Out: 250-mgw1.MEIway.com
Out: 250-PIPELINING
Out: 250-SIZE 40000000
Out: 250-ETRN
Out: 250 8BITMIME
In: MAIL From:<[EMAIL PROTECTED]> SIZE=4608
Out: 250 Ok
In: RCPT To:<[EMAIL PROTECTED]>
Out: 554 Service unavailable; [202.108.251.80] blocked using relays.ordb.org,
reason: Blackholed by ORDB -- see
http://ordb.org/lookup/?host=202.108.251.80
>Is there a way to do that with IMGate/Postfix? I would like to
>explain to people why they were being blocked and tell them to rename the
>file or whatever.
It's very hard to "explain" to "people" your many policy reasons that
trigger rejections. Some "people" are just "unreachable" by the written
word. :))
People who are smart enough to understand your explanation are already
smart enough to :
1. re-send the same msg, x times.
2. then send another msg, that gets through.
3. figger something out.
In other parts of IMGate and IMGateAV, you do have the possibility of
entering your own text behind the SMTP response code, or in the "virus
detected" notice msg.
But in some cases, BOFH is an attitude that is its own reward. :))
Len
http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND 8.2.4 for NT4 & W2K
http://IMGate.MEIway.com : Build free, hi-perf, anti-abuse mail gateways
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