Our qmail system is working fine internally and can send out to the 'net
OK. We're only receiving from certain domains, however, from others
intermittently and from some not at all. I know this is usually a DNS
issue and I've checked the MX records for our domain, 'nethan.com' and
it appears OK:
- Name=nethan.com
Type=MX, Class=1, TTL=39072 (10 Hours 51 Minutes 12 Seconds),
RDLENGTH=9
Preference=1, Mail Exchange=mail.nethan.com
Authority Records Section:
<deleted>
Additional Records Section:
- Name=mail.nethan.com
Type=A, Class=1, TTL=42982 (11 Hours 56 Minutes 22 Seconds),
RDLENGTH=4
IP Address=216.251.137.227
- Name=NS1.SOHOSKYWAY.NET
Type=A, Class=1, TTL=43200 (12 Hours), RDLENGTH=4
IP Address=209.17.143.10
- Name=NS2.SOHOSKYWAY.NET
Type=A, Class=1, TTL=43200 (12 Hours), RDLENGTH=4
IP Address=209.17.177.1
However, a reverse DNS on our mail server's IP turns up:
- Name=227.137.251.216.IN-ADDR.ARPA
Type=PTR, Class=1, TTL=43200 (12 Hours), RDLENGTH=20
PTR=137-227.ntcare.com
Would this reverse-DNS entry (apparently there for the convenience of
the ISP's reseller) be preventing some mail servers from forwarding to
ours?
Thanks,
Barry
