What Is Mx Priority. A backup MX record is just an MX record for a mail server with a higher priority value which means a lower priority so that under normal circumstances mail will go to the more prioritized servers. The MX record preference is used when more than one MX record is entered for any single domain name that is using more than one mail server.
The other MX records designate the backup computers in case the actual target computer is not accissible. Thing is while ive changed the MX priorities to 0200 and 300 instead of 100200300 which was the previous default priorities with the on premises MX record to be the lowest one i am still getting some of the emails back sometimes when sending to this domain i can always send from Gmail though without a problem. If you have just one Mx server then the number you choose is irrelevant because it isnt relative to any other servers anyway.
An Introduction of MX Records Priority.
The MX record preference is used when more than one MX record is entered for any single domain name that is using more than one mail server. Lowest number is most preferred. Ein MX-Eintrag besteht aus einer positiven Ganzzahl zwischen 0 und 65535 Priorität und einem Domainnamen der auf einen A-Eintrag verweist. That number whether 0 or 10 or 528 refers to the priority of the Mx server.
