[Discuss] E-mail Server Help?

[Kent Borg]

I'm getting a complaint from AT&T saying I don't have reverse DNS set up 
correctly.

> host ff-ip4-mx-vip2.prodigy.net[144.160.159.22]
> said: 550 5.7.1 Connections not accepted from servers without a valid
> sender domain.flph839 Fix reverse DNS for 64.105.205.123 (in reply to MAIL
> FROM command)

Looks to me like I do. Anyone know what they are complaining about?

Thanks,

-kb