multiple server for forwarding?

[Marko Weber]

hello list, good mornin`

i want my amavis on own server to do his work,
after scanning for viri i want to pump back the mails to the postfix 
instance where they come from.

is this the right way when i have mx-servers? i want to place two 
mx-server so that if one down amavis can pump
the mails to the 2nd server which is up.


$forward_method = 
'smtp:[88.xxx.xxx.xxx]:10025','smtp:[99.xxx.xxx.xxx]:10025';

Is this right syntax?

thank you,
from sunny but windy cloudy hamburg today

marko