This is typical networking issues. Nothing about postfix. Regards
> > So I have a bizarre problem. I can't send e-mail to some servers but I can to > others. The e-mail that doesn't get sent is due to the connection timing out > to the remote server. > > Another strange problem is that some people can e-mail me while others can't. > > This is how my e-mail server is setup off the top of my head: > > E-mail server has a CG-NAT IP address. > E-mail server connects to a VPN on a VPS. > Postfix uses VPN interface '192.168.2.2'. > VPS routes port 25 from WAN interface to '192.168.2.2'. > VPS routes port 25 from '192.168.2.2' to WAN interface. > E-mail server firewall allows port 25 in and out on '192.168.2.2'. > VPS firewall allows port 25 in and out on WAN interface. > MX record points to VPS WAN interface IP address. > > Everything should work, but it doesn't always. > _______________________________________________ > Postfix-users mailing list -- postfix-users@postfix.org > To unsubscribe send an email to postfix-users-le...@postfix.org > -- https://kenpeng.pages.dev/ _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
