Hi! I have a client who tells me they are not receiving emails from some recipients. Some of these emails would be enquiries from potential first-time customers, so they would not be expecting the emails, however, some of them have complained that no one has responded to their query.
This has been going on for a very long time. At the beginning, I was hosting their mail on the mail server I personally use also. While I never experienced any issues, they did. I then put them on to a different mail server and also set up a backup mail server. They reported the same issues. After I had checked all possibilities of failure and didn't find anything, I paid for their mail to be hosted on Google Apps Premier Edition.
They now tell me they are still getting reports from people who have sent enquiries but have not received a response. They didn't receive the enquiries.
I emailed Google to ask them to look into it, but they asked me to forward them the headers of an email that was sent to my clients. Unfortunately, I have not been able to get my hands on a copy.
I'm not really sure where to go from here, but my client is getting very frustrated. I've double-checked the MX records-they all appear to be set up correctly.
I'd appreciate any help or suggestions.