I have a few users in my organization complaining that they are receiving e-mail messages hours and even days after they were sent. Outgoing e-mail is working flawlessly.
We are hosting the primary DNS server for the domain in house, and have secondary DNS servers with Verizon. There is one MX record for the domain, and it exists on all name servers for the domain - the primary and all secondaries.
Can someone check my DNS zone records for my domain and tell me if they see any problems that would be causing this? My domain is mbly.com.
Any criticisms and/or advice will be highly appreciated. Thanks.