output screen as you suggested
Thanks for your suggestions and help.
below are the output of commands as you suggested
[root@rks ~]# netstat -tap | grep smtp
tcp 0 0 *:smtp *:* LIST EN 30167/sendmail: acc
tcp 0 0 rks.hpitr.com:smtp rks.hpitr.com:49854 TIME _WAIT -
I have also checked our ip is not blacklisted anywhere.
Is there this problem coming because of mx records.
below are the mx record details
Domain Name: testbag.com
dns1.vsnl.com reports the following MX records:
Preference Host Name IP Address TTL
0 mail.net4india.com 18.104.22.168 86400
Please suggest me what can be solution of this problem