if you have a secondary mail server...

if you have a secondary mail server, i mean the mx set higher than the primary one, and in some occassions mails get sent to the secondary one when the primary is down or by whateevr reasons

how do u fetch mails back at once? i mean is there a software/script needed to run in the secondary server to put the mails back to the primary server regularly? or u should log in both servers just to retrieve all emails back?

thanks

 

 

 

 

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