NDR | LuxSci FYI

Posts Tagged ‘NDR’

Where’s the Email? The Case of Missing or Disappearing Messages

Wednesday, March 4th, 2009

In many ways, the Internet is still like the Wild Wild West. Email messages sent to you or from you can and do “go missing” for no apparent reason. This can happen no matter what email provider you use. So, what happened to these “AWOL” messages? How can you diagnose and solve the problem?

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Tags: blacklist, bounce, bounce message, delivery failure, denied, disappearing email, dns, email provider, failure, filters, firewall, mail server, missing, missing email, mx, NDR, non-delivery, non-delivery report, permanent, permanent failure, server logs, temporary failure
Posted in LuxSci Library: The Technical Side of Email, TechNotes
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Bounce Back & BackScatter Spam - “Who Stole My Email Address”?

Tuesday, December 9th, 2008

So, you’re minding your own business, going about your daily tasks, checking your email, and suddenly your INBOX is flooded with a series of non-delivery reports (aka NDRs or bounce messages). But wait just a minute, you didn’t send these. How did this happen? Did someone steal your email address? How is that possible?

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Tags: backscatter, bounce, bounce message, catch-all, challenge response, dkim, domain keys, email alias, email forgery, mailer daemon, NDR, sender policy framework, spam, spf
Posted in LuxSci Library: The Technical Side of Email, TechNotes
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LuxSci FYI

Posts Tagged ‘NDR’

Where’s the Email? The Case of Missing or Disappearing Messages

Bounce Back & BackScatter Spam - “Who Stole My Email Address”?

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