DSXchange

Is It possible to set the e-mail notification to two user ata time ?

Sure. You just need to find the separator you need for your email system. Probably a space but it could be a comma or something else entirely. Experiment. We are talking about the Notification Activity stage in a Sequence job, yes?

Consider using a 'group' contact. That way one address can be used to contact multiple people and those people can be changed without having to edit and redeploy the job each time. Or if you are on a 7.5.x version, use a parameter. Or both!

Heck, why not just send to the "all" list on your mail server?

That way you'd be certain that it was sent to your desired recipients.

Make sure that it comes from an anonymous sender, for example datastage@UNIXmachine

That reminds me of a prank once done using data stage: Sending in a resignation letter by using a valid 'From Address'.