Hello,
i read the documentation about the usage of "[" and "]" in relayhost
entries ...
I still not quite sure what happens or not happens when using an IP with
or without such signs...
relayhost = 1.2.3.4
may use MX records from DNS?
What if there is no nameserver configured? Will there be any timeouts?
relayhost = [1.2.3.4]
may not use MX records from DNS?
What if there is no nameserver configured? Will there be any timeouts?
The same goes for FQHNs ...
So, does anybody know what technically is the difference between the use
with and without the signs?
I mean, what network things may happen or not happen?
