MX records expired

Company MX records expired today. I've renewed the hosting today and I start recieving mails slowly.

I need to know if the emails I recieved yesterday while the MX Record was expired will get lost? or I will get them back later?

Thanks
Ramzi
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ramziabkAsked:
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rjanowskyConnect With a Mentor Commented:
If the complete domain couldn't be found in the global DNS, then the mail is most probably lost. If only the mail exchangers become disconnected for some time, the mail will stay in a queue at the sending mail servers and will be re-sent in the near future (up to 72 h).
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James HodgeConnect With a Mentor Managing DirectorCommented:
In short, it depends how the send connector on the sending server is configured to handle this. If the send connector 'gives up' after a few hours then the email would have bounced. Some Send Connectors would be configured to try for longer, sometiems days. Hence why you have received some mail in today after DNS has propagated again.

There are services available to protect aginst this sort of thing.
http://dyn.com/email/dyn-email-backup-mx/
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