I recently launched a free product for Newsletter creators called CrowdMagnet to find cross promotion opportunities. https://www.getcrowdmagnet.com
When someone signs up they provide info about their newsletter and screenshots to prove their subscriber count / open rate.
I get an automated internal email any time someone completes signup so that I can verify the screenshots and send them a welcome email.
Sometimes, If I'm at my computer, I can review the screenshots and fire off the welcome email literally 1-2 minutes after the user signed up.
The Welcome email is slightly personalized so they can tell it's not automated and that a human actually sent it.
Is it creepy / weird to send the email so soon? Should I wait at least 10-15 minutes before sending off the welcome email?