The PIX smtp protocol will not permit SMTP Auth
If you wish to use SMTP Auth with IMail on the inside of a PIX firewall,
your configuration should include:
NO fixup protocol smtp 25

If you wish to use web mail, you will also need to add a conduit for port
8383 (or whichever port you choose for web mail)

Why have you opened port 113?

----snip----
I have recently begun preparations for going live with iMail for a 2000 user
organization.  I have a PIX 515 firewall with one inside and one outside
interface.  From what I understand, I can still place public mail and web
servers inside my protected NAT area.  I was wondering if anyone else has
done this with PIX 515 and iMail, as I have not and was curious as to if
there are any issues.  The config would resemble:

fixup protocol smtp 25
static (inside, outside) <public ip> <private ip>
netmask 255.255.255.255 10 10
conduit permit tcp host <public ip> eq smtp any
conduit permit tcp host <public ip> eq 113 any

Any suggestions would be appreciated.

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