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Symantec Email Proxy "unable to be sent"

Created: 08 Oct 2012 | 2 comments

We have Symantec Endpoint Small Business 12.1.1000 157 RU1. It's on Windows 2003 SBS, and my computer Windows XP. We host our website / email with Yahoo! Small Business. We're on Comcast internet.

Lately I keep getting this error every other email I send:

"Symantec Email Proxy

was unable to be sent because the connection to your mail server was interrupted. Please open your email client and re-send the message from the Sent Message folder."

Should I contact Yahoo! Small Business or should I be looking at Symantec as a possible problem?

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Mithun Sanghavi's picture


Here's a link to the official corresponding Symantec article: Many Unexpected Pop-Ups from Symantec Email Proxy are Displayed

Is your system infected? Symantec tools to help clear an infection

There have been a couple of good forum threads about that error message:

As a Workaround, try these steps -

  1. go to add remove program
  2. Select Symantec Endpoint protection , click Change and then Modify
  3. Uncheck Anti Virus Email Protection and install.

That Email Protection only examines messages for threats (worms, viruses, etc).  It does not scan for spam: there are other products which provide that protection (Symantec Mail Security for MS Exchange). As far as I am aware it wouldn't be responsible for sending mails like the ones you have added to this forum thread.

All the same, I recommend that, as a best practice, steps are made to ensure that all clients are runnig the latest releases of SEP or SAV, have up-to-date definitions, and all MS patches are applied.

Hope that helps!!

Mithun Sanghavi
Associate Security Architect


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