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Problem started today. I can send from email account but cannot receive incoming email. I did not change any settings on my account. I have tried to send from different accounts but all email to my address comes back with the "failed" message and the "no MX or A records for" message.

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This looks like a DNS problem on Your sending MTA. Have You tried to send test emails from other providers like Gmail?

# host has address mail is handled by 5 mail is handled by 5 mail is handled by 5 mail is handled by 5

# host -t A has address
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Microsoft had a huge DNS failure earlier today – Sathya Nov 22 '13 at 9:19

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