On 12/04/2014 07:46 PM, Wietse Venema wrote:
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.
You said something here that triggered a thought....
The new server is on a different internal net than the old, thus
different firewall rules. I checked over all the addressing and
everything there is right, but...
DCC (udp port 6277) was enabled for the old mailserver, but not the
new! Could that be the problem? Well I enabled DCC and we will see as
I just sent a new message from yahoo.
If this does not work, I will move the new server to the old address.
Really intended to do that after I turned down the old server...
