I'm struggling to find any documentation to determine how I'm supposed to go about changing the port used for SMTP - as far as I can tell this useful (essential!) feature has been removed at some point?!
have you tried just using a colon to denote this?
EDIT: just tested this and it didn't like it very much. let me look at this.
We did remove it inadvertently, and it will be back in 3.0 Beta. Sorry about that.