Hello everybody,
I just want to update my 2 brghtmail server.
My public dns that has two mx record and both point to the brightmail server.
The both brightmail have the same ip address and both have control center and scanner. But the brightmail server that act like backup, has different weight in the dns as you can see in the picture and is shutdown.
My dude is how can update the brigtmail server without loose any mail, because i read some article that i my stopt recive incomming mail, but if i do this i will lost emails and i can not power on the other brightmail becasue it has the same ip address than the server i must update.
What is the best way to do this ?
1.- Change the ip address of one brighmail server and then update one , stoping the incoming mail ?? If i do this how can i say to brightmal that must forward the email to the backup brightmail ?
2.- I must change the ip address of one brighmail server and then update one, stoping the incoming mail and the SMTP protocol will detect this fail (revoke incoming mail) and resend the email to the secondary mx server.
I hope someone can help me.