In SD+ Enterprise we configure the mail server and works OK, but some notifications take too much time to get out from SD+

You'll see, we make some tests with the same mail server configuration in Outlook, the same mail server, ports, protocols, user, and one mail goes around less than a minute.

But when we program a "picked up yet" notification within a minute sometimes take up to 10 minutes to show, why?

Meanwhile we send two or three mails thru this mail account, so we could see if the mail server works Ok, and those mails in Outlook goes up and down before SD+ does his own notification (and get this in the mailbox)

Even the notification mail says in his body that the notification was created about 10 minutes after the request was created. The support group is configurated to notify when a request wasn't pickup 1 minute after his creation, so 10 minutes later is... you know.

Is there any configuration that can I do? making this time lower in SD+ ?

Thank you in advance