I did some checking. The list server (ilug-bom.org.in has no MX records, so mails are delivered to the A record which is 74.207.228.67) requires all of the following resolving properly for it to accept emails:
1. The connection must be from an IP address that resolves in the reverse direction. 2. The reverse-resolved name in (1) must forward-resolve too. 3. The name used in the HELO/EHLO needs to resolve as well. 4. And finally, the domain of the address in the MAIL FROM should resolve too.
Best would be to relay through Gmail.
Binand
On 19 February 2013 02:01, J T Dsouza jtd1959@gmail.com wrote:
On Mon, Feb 18, 2013 at 5:42 PM, Binand Sethumadhavan <binand@gmail.com
wrote:
Helo command rejected: Host not found
-helo_name debamd.localnet
host mm.ilug-bom.org.in [74.207.228.67]: 450 4.7.1 <mail.sparc.net>: Helo command rejected: Host not found
This is the list server not resolving mail.sparc.net, which is not resolvable anyway.
Seems like the new avatar of the list server requires the HELO name to be
resolvable. Why don't you relay your list emails via MTNL's (or Gmail's, easier to setup I guess) servers?
MTNL has stopped allowing relaying afaik.