amangue
i would like to know how to add mail account for second domain, Ex user@mydomain2.com, when i add user automatically comes in primary domain ..
Please read the manual, specifically the Pseudonyms section.
Also there is an entry all about this in the FAQ in the Email section (towards the end I think).
In brief:
SME server only supports one username set, so userjoe can only be entered once as a user.
You can workaround this limitation by using domain based pseudonyms ie
you create pseudonyms for
joe@domain1 which forwards to userjoe1
joe@domain2 which forwards to userjoe2
& so on
Think about it a bit before you race in & start setting up users.