Try the IDS software for the pix.
Jason ----- Original Message ----- From: "Sanford Whiteman" <[EMAIL PROTECTED]> To: "David Sullivan" <[EMAIL PROTECTED]> Sent: Monday, May 06, 2002 3:11 PM Subject: Re[2]: [IMail Forum] SMTP Commands > > So...will Imail work OK without the ESMTP commands? > > You will be deprived of the following functionality, with the > associated consequences: > > SIZE - Mailers will think they are unable to warn your server upfront > about the size of an incoming message, nor will the maximum size of a > message be able to be announced from server to client. This will > likely have no effect, as the remote server will fall back to just > sending the message regardless, letting the server decide whether to > reject it after the DATA is sent. > > 8BITMIME - Mailers will not be requested to send 8-bit MIME encoded > messages; some will anyway, while others will switch to alternate > encoding. Since Imail continues to support 8-Bit MIME internally > whether or not it is announced in the EHLO, there's unlikely to be a > problem. > > DSN - Mailers will assume they cannot request extended DSN options, > which could result in non/delivery notifications not being sent at all > in some cases. > > ETRN - Remote dial-up SMTP clients for whom you are queueing mail will > be disabled. > > AUTH - Self-explanatory. > > EXPN - Users will not be able to list the members of Group Aliases, > which is just as well. > > Be aware in general that turning off ESMTP, which is the default > protocol for many mailers, means, as the saying goes, "a persistent > small expansion in traffic" for little to no return as the mailers > fall back to standard SMTP. As Len said, SMTP Fixup is really > half-baked. For instance, the PIX is not gonna save you from, nor > detect, a perfectly RFC 821-compliant DoS attack. > > -Sandy > > > Please visit http://www.ipswitch.com/support/mailing-lists.html > to be removed from this list. > > An Archive of this list is available at: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > > Please visit the Knowledge Base for answers to frequently asked > questions: http://www.ipswitch.com/support/IMail/ > Please visit http://www.ipswitch.com/support/mailing-lists.html to be removed from this list. An Archive of this list is available at: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Please visit the Knowledge Base for answers to frequently asked questions: http://www.ipswitch.com/support/IMail/
