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a potentially executable attachment "(null).eml"

"This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

 xxx@xxx.xxx
   This message has been rejected because it has
   a potentially executable attachment "(null).eml"
   This form of attachment has been used by
   recent viruses or other malware.
   If you meant to send this file then please
   package it up as a zip file and resend it..."

As Thunderbird forwards a lot of emails this way, what can be done?

2007-06-27 06:54 AM

Hello,

This is occuring because entries for the .eml extension is included in the "antivirus settings" related file which is being utilized by exim (e-mail) service to overcome spam. Please change the settings of the e-mail client that you are using to the standard ones so that you can overcome the issue. Also note that we cannot remove the current settings in the server to allow the same.



2007-06-27 07:07 AM

Regards,
Rahul
change the settings of the e-mail client that you are using to the standard ones

In Thunderbird change "Tools | Options | Composition | Forward Messages" from "Inline" to "as Attachment"

2007-06-27 08:50 AM

Please refer the links below. Also it is best preffered to send e-mails via plain text.  

http://www.mozilla.org/support/thunderbird/menu#messageforwardasattachment

http://kb.mozillazine.org/Plain_text_e-mail_(Thunderbird)

2007-06-27 09:14 AM

Regards,
Rahul
Please refer the links below

The link is not helpful.  I verified the fix above by testing.

Also it is best preffered to send e-mails via plain text

Condescension?

2007-06-27 09:35 AM

Hello,

Can you make things straight? Is it working or not working.
I mean are you still having issue with Thunderbird.

2007-06-27 09:43 AM

Regards,
Rahul
It is working.  If Thunderbird's "Forward Messages" option is set to "Inline" it won't work (it creates an attachment called "(null).eml").  If it is set to "as Attachment" it will work.  I post this info so future victims will find it when searching the forum.

2007-06-27 09:59 AM

This is just FEI (for everybody's information).  I don't expect a response.

That didn't actually work.  The above only fixes the (null) case.  The .eml extention is added on attachments.  This discussion is about it

https://bugzilla.mozilla.org/show_bug.cgi?id=220646

This Thunderbird extension can be used to zip or just rename the attachment

https://addons.mozilla.org/en-US/thunderbird/addon/4003

Also rejected are attachments where the name *starts* with unapproved file names like "hostingrails.com doesn't do Java", "ipconfig.exe is a useful program", etc., while "exim finds hostingrails.com with a regexp" will sail through just fine.

Received emails from our customers are rejected in the same way.

2007-06-28 05:28 PM


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