Robert Moskowitz:
>
> On 12/04/2014 07:02 PM, Wietse Venema wrote:
> > Robert Moskowitz:
> >> My new server does not seem to be allowing yahoo or ymail to deliver mail.
> >>
> >> I do not see anything in maillog, not supprisingly. My son reports he
> > Postfix logs all connection attempts, so they are not coming through
> > some firewall, or they aren't getting your DNS information.
>
> It worked before the new server, so not a firewall item, as nothing
> changed there. As far as DNS, I changed server name in MX record. I
> would hope they are getting z9m9z.htt-consult.com now rather than
> klovia.htt-consult.com. But there is also the spf record I added for gmail:
>
> htt-consult.com. IN TXT "v=spf1 mx ~all"
>
> And I do get emails from gmail, and can send them to gmail.
Speaking from experience, a bad netmask on a server can have
surprising effects. So can a bad netmask on a router. It totally
screws up routing, and one has no idea what is going until one runs
a sniffer.
Wietse
