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Is it possible the following error could cause emails to not be sent?

 warning: numeric domain name in resource data of MX record for domain.com: xx.xxx.xxx.xxx

Our customer support department says there' been a huge spike in customers not receiving RMA emails. No code on the RMA site has changed at all, we haven't updated the production server. I'm showing about a 97% success rate on emails being sent from the server logs.

Any ideas on what I should look at to determine the cause?

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1 Answer 1

up vote 2 down vote accepted

An MX record should be a fully qualified domain name, not an IP address. Most clients will send to an IP address, but some won't. It's a simple fix, why take the risk? Just make sure you have a corresponding A record.

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