Re: [FW-1] SMTP Security Server and "550 Mailbox Unavailable" errors

[Mark Anderson <mark_anderson222@FW1-NOSPAMHOTMAIL.COM>]

It's not a simple problem like that - for example, I sent myself three
e-mails from outside to inside. Two arrived and one bounced with mailbox
unavailable. There's no reason for that third one to bounce as it was
identical to the first two.

If you're running without the insertion of the "Received:" line turned on as
required by RFC 2821, you'll have problems - with 4.1 SP6 it was quite
infrequent but with NG FP3 it was a large percentage of the mails.

Thanks folks for the feedback - especially Thomas Bleek. Knowing that
someone has a solution for this helps since we're a bit worried about
putting the NG firewall back again.

> From: Reinhard Stich <r.stich@INTERNET-SECURITY.AT>
>
> hi,
>
> fw1 security server noimally rejects an email with mailbox unavailable if
> it is addressed to an invalid destination address or is coming from an
> invalid source-address.
>
> I use fw1 security server and never had problems like that.
>
> cheers
> reinhard
>
>         -----Ursprüngliche Nachricht-----
>         Von: Mark Anderson [mailto:mark_anderson222@HOTMAIL.COM]
>         Gesendet: Di 01.07.2003 22:06
>         An: FW-1-MAILINGLIST@AMADEUS.US.CHECKPOINT.COM
>         Cc:
>         Betreff: [FW-1] SMTP Security Server and "550 Mailbox Unavailable"
> errors
>
>
>
>         We've been using the SMTP security server to front-end our
> Sendmail systems
>         for some time.
>         While running Firewall-1 4.1, we very occasionally saw e-mail
> bounced by the
>         firewall with the error in the subject line - "Mailbox
> Unavailable". It
>         wasn't frequent enough to be noticable, but happened now and then.
>
>         We upgraded to NG FP3. All hell broke loose - a large percentage
> of our
>         inbound e-mail was getting bounced with "Mailbox Unavailable". A
> few
>         searches using Google have found that there are others that have
> apparently
>         seen this problem, which is "fixed" by turning off the option that
> has the
>         firewall add a "Received" line to the incoming mail.
> Unfortunately, doing
>         this makes spam tracking impossible.
>
>         However, given the fact that others have posted about this on this
> mailing
>         list, *Checkpoint claims they've never heard about anyone having
> this
>         problem!!!*
>
>         Is that true? Has *nobody else* reported these errors to
> Checkpoint? Or, are
>         they just giving us a story?
>         Is anyone else working with them on a fix? Does turning off the
> addition of
>         the "Received" line really fix this problem?
>
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