Sendmail - "sender domain mast Resolve"

[Zlatan Vassilev]

W?en I lose my conection whit ISP my local users cant exchange meseges??
"sender domain mast Resolve"
I use sendmail over OpenBSD2.6

[Berlene Herren]

The "sender domain must resolve" message is being issued because the receiving sendmail is set up to verify the senders host name as part of the spam prevention features, and it cannot do this because hostname.com is not in DNS. You needs to add an A record to your DNS files for hostname.com.

Hope this helps,
Berlene

[Zlatan Vassilev]

I thing it will do, but how to write a reing of adress from LAN 192.168.1.1 to 192.168.1.255 in A record?
I meant:

lan IN A 212.121.121.2
lan1 IN A 192.168.1.1:255

or something like this?