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NDRs (Non-Delivery Reports)

9/10/2008 8:17:00 AM

NDR spam: Why am I receiving an NDR for a message I didn’t send?

NDRs are a normal part of email exchanges, but spammers' activities can cause spikes in NDR activity. Spammers send junk messages to thousands of email addresses, some of which exist and some of which do not. To give the appearance that their messages are legitimate, spammers use a practice called "spoofing," whe   more...

 Actual vs. Typical SMTP Response Times (Hourly)

Relative Response Today

Shows an hour-by-hour comparison of SMTP response times today vs. the historical profile for this day of the week.

Shows the relative percentage difference in SMTP response times today vs. those typical of this day of the week.

 

 Average SMTP Response times over the last 7 days

This chart shows a seven day history of average SMTP server response times.


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