I would like to set up two MX servers with equal priority One MX server resides on the same physical machine as the Dovecot service the other MX server is located in a remote data center
Depends what the intent is. Is it for load balancing or is it for backup because server A is sometimes offline? You have two ways to do this. You can setup server B as a relay server, it doesn't have any inboxes. You have to replicate a list of valid users on server B. Postfix would then accept email for those users and then try to relay (redeliver) that email to server A to be stored in the user's inbox on server A. But if your intent is load balancing you aren't saving server A from stress as it has to accept and process email from server B the same as if the sender sent it directly to server A instead of server B. I suppose there are some tricks you can use to cause server B to delay delivering mail to server A telling it to only delivery so many messages per minute/hour to reduce load on server A. But then you get emails queued up on server B and it might be a few hours before the user gets that email in their inbox on server A. Another option would be to setup some kind of NFS drive on server A that server B could access over the internet. Server B is a final destination same as server A with almost identical configuration. You would either copy over flat files of users between servers or have a db both servers can query for user/domain data. Server B would then save the emails to the "local" inbox of the user. Which is actually an NFS mount to server A's hard drive. But if your config is not letting postfix deliver mail to inbox, such as you use dovecot for LDA or LMTP then you would also have to clone your dovecot setup on server B and have dovecot then try to save the email over the NFS mount. However if your intent of having two servers is as a backup because sometimes server A is offline, then the NFS mount would be down and postfix/dovecot would choke when trying to deliver email to drive. Many moving parts and ways to configure, but without knowing your intention it's hard to suggest which way would work best for you. _______________________________________________ Postfix-users mailing list -- postfix-users@postfix.org To unsubscribe send an email to postfix-users-le...@postfix.org
