I am receiving all emails 1hr delay from a particular domain. Ex 123@abc.com
but from other all domain example @gmail.com, @ live.com, @Hotmail.com, I can receiving email to my exchange server immdtly.
how to solve my issue.
Note: abc.com is sending a group email where 15 domain are there in that group. Every one receiving email immidtly only my domain is getting delay.