Can a SMTP mail server IP address be verified against MX DNS entry

[Vasoo Veerapen]

Good day group,

My problem: I want to filter SMTP mail and configure my Checkpoint
firewall to check the originating SMTP servers IP address against a
DNS MX entry

For example, I want my firewall to reject inbound mail from
"microsoft.com" originating from a dial-up account.

Ideas anyone?

[Chris]

Post by Vasoo Veerapen
Good day group,
My problem: I want to filter SMTP mail and configure my Checkpoint
firewall to check the originating SMTP servers IP address against a
DNS MX entry
For example, I want my firewall to reject inbound mail from
"microsoft.com" originating from a dial-up account.
Ideas anyone?

Not sure if firewall-1 can do this but it's something usually done on the
mail server itself.

Chris.