I'm using Rich Mail and it works well.
I have only one problem, when I send a message to two diferent person in the field "TO", none of them received the message.
I tried "sender1@test.pt; sender2@test.pt" but still doesn't work.

Any ideias?
Hi Pedro,

You can use commas instead of semi-commas to send to several recipients. ex:
"sender1@test.pt, sender2@test.pt"

You can see Rich Mail's help by opening the extension in OutSystems Integration Studio - you'll find a Richmail.chm function it it's resources.

Tiago Simões