Native Domino SMTP and AnyMail/400

Hi,

We are about to upgrade to R5 and have to make a decision as to what type of
SMTP to implement.

We currently use SNDDST to send emails which sort of means we will have to
run the AnyMail/400 SMTP.

If I changed the port of the AS/400 SMTP server to something other than 25
and used the Native Domino SMTP would SNDDST still work on the AS/400? And
could I run the 2 SMTP servers. If so, would it only be possible to send
mail from the AS/400 and not receive it?

When setting up Domino is it easy enough to try Native, then try AnyMail
SMTP and then put Native SMTP back just to try things? Will it cause
problems?

Running R5 on V4R5.

TIA

Nathan Simpson