Originally Posted by till
PLease check the dns records of domain xyz.com and ensure that there is a A-Record for mail.xyz.com pointing to the IP address of your server.
A and MX record both is there for mail.xyz.com and I can ping it. I asked to my provider and they confirmed no port is blocked. I configured 587 port but it is still the same. I can telnet to localhost/private IP but not mail.xyz.com.
I disabled the firewall in my router and checked the NAT for 25/587, they are ok. I also disabled the iptables in the server (to check). But nothing helped. Just one more information, I can't also telnet mail.xyz.com 110/143
, none works.
Seems something is blocking my smtp/pop3/imap ports for accessing from outside.
Do you think my postfix config is ok?