User`s guide

DNAT Either the nInternet
etwork object or a
specific public IP
address. For
example, the IP
address of the
hosting provider.
The destination
depends on the
advertised method of
receiving email.
If it is one or
more external
static IP
addresses,
enter those
addresses (a
CIDR
summarization
of addresses
can also be
used).
If it is a domain
name which
maps to a
dynamically
assigned IP
address, select
the network
object named A
.ny
POP2
POP3
POP3S
IMAP
IMAPS
No SNAT (the
original source IP
address is used)
The internal static IP
address of the mail
server .
Case 3 – Mail Server Only
If you do not have a Barracuda Spam & Virus Firewall, you can redirect the incoming traffic to the mail server that is on your internal network.
Go to the page and configure the following rule to redirect the incoming mail traffic:FIREWALL > Firewall Rules
EMAIL-2-MAIL-SERVER Values:
Action Source Destination Service (select
relevant ones)
Connection Redirected To
DNAT Either the nInternet
etwork object or a
specific public IP
address. For
example, the IP
address of the
hosting provider.
The destination
depends on the
advertised method of
receiving email.
If it is one or
more external
static IP
addresses, ente
r those
(aaddresses
CIDR
summarization
of addresses
can also be
used).
If it is a domain
name which
maps to a
dynamically
assigned IP
address, select
the network
object named A
.ny
SMTP
POP2
POP3
POP3S
IMAP
IMAPS
No SNAT (the
original source IP
address is used)
The internal static IP
address of the mail
server.