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Home>Woody's Windows>ISPs block some outgoing e-mail unexpectedly

ISPs block some outgoing e-mail unexpectedly

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Woody leonhard By Woody Leonhard

Recently, many Windows Secrets readers — me among them — discovered that they could no longer send e-mail, although they could still receive messages.

In an attempt to reduce spam, many ISPs, including Verizon as of a few months ago, now block all outbound traffic on what used to be the de facto avenue for e-mail, port 25 — leaving customers in the lurch.

E-mail glitches rate among the most difficult, distressing, and dire problems in all of computer-dumb. Orphaned e-mail programs, operating systems with more patches than a clown’s coat, the whims of intransigent e-mail and Internet service providers, and the phases of the moon combine to make e-mail problems devilishly difficult to solve.

And any e-mail glitches you fix today will undoubtedly require even more remedial attention in a month or a year.

One problem pops up regularly over the years because an ISP suddenly blocks all outbound communication using port 25. This glitch has a very specific symptom: your e-mail program — whether Outlook, Windows Live Mail, Outlook Express, Windows Mail, Thunderbird, or Eudora — suddenly loses its ability to send mail. You can receive messages with no problem, but every e-mail you try to send sticks in your outbox.

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Related posts:

  1. Outbound Mail Filters Needed?
  2. Exporting Your OE Mail
  3. Time to dump Outlook Express and Windows Mail
  4. Changing Outlook’s “Junk Mail” Filters
  5. E-mail form letters save you time and trouble
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All Windows Secrets articles posted on 2009-08-27:

  • Introduction New info leads to today’s unscheduled newsletter
  • Top Story Security Baseline provides basic PC protection
  • Woody's Windows ISPs block some outgoing e-mail unexpectedly
  • Patch Watch IE 8 is being pushed to systems that blocked it
  •  Show all articles on a single page
Woody Leonhard

About Woody Leonhard

Woody Leonhard is a Windows Secrets senior editor and a senior contributing editor at InfoWorld. His books on Windows and Office include the award-winning Windows 7 All-In-One For Dummies. His many writings cast a critical eye on the latest industry shenanigans.
View all posts by Woody Leonhard →
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