all of my users have problems sending SMTP port 25 email. as they all use different smtp server.

what rule do i set so that all their port 25 gets forwarded to my SMTP server??

all my clients are 192.168.5.0/24

my offsite SMTP server is 192.168.1.109

both can ping each other.

i set a rule on the 5.0/24 side:

/add chain=dstnat action=dst-nat to-addresses=192.168.1.109 to-ports=25 in-interface=ether1-uplinkSW \
src-address=192.168.5.0/24 dst-port=25 protocol=tcp comment="" disabled=no


this should do it right?? so that no matter what the end user has their port 25 smtp server set to, it should be forced to my smtp server right?

thanks

Looks like it should work. But this service includes authentication. What will you do with users credentials? Accept all/any on your mail server?