Definitions for messages 'delivered' vs. 'opened'?

Edit Subject

Hello Cameron,

Messaged delivered = messages accepted by a remote mail server.

Messages opened = messages tracked utilizing an invisible image. It works by adding an invisible image at the end of the email. If the email recipient has images enabled on the email client, a request to server for the invisible image is executed and an open is then logged.

Since stats are collected daily, if you send a message yesterday, and I open it today, yesterday's stats show 1 delivery and 0 opens and today's stats would show 1 open and 0 deliveries.

Thank you for taking the time to write your question and don't hesitate to contact us if you need further help.

http://support.sendgrid.com/home

With Best Regards,

Elmer Thomas

So, if not all the messages that I send (I guess that is requests) are being delivered, what is happening to them?

Thanks,
Cameron

Hi Cameron,

Take a look at the following two articles that deal with deliverability, specifically the discrepancy between requests and delivered that you're seeing, and what to check when your emails aren't being delivered:

http://support.sendgrid.com/entries/1...

http://support.sendgrid.com/entries/1...