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Old 02-29-2008, 03:17 AM   #1
tajamari
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sendmail error with excel file macro attachment


Im having problems with excel file attachment with macros. Emails doesnt reach the user's mailbox. But excel files without macros can be received. Im using sendmail version 8.14.1 for this item,

But on my other mail server using sendmail version 8.11.6p2, I can received the excel file attachment.

SAMPLE LOG FILE FOR UNRECEIVED EXCEL WITH MACRO ATTACHMENT
[root@mail log]# cat /var/log/maillog | grep m1T8vk8U013394
Feb 29 16:57:46 mail sendmail[13394]: m1T8vk8U013394: collect: premature EOM: Connection reset by smtp.domain1.net
Feb 29 16:57:46 mail sendmail[13394]: m1T8vk8U013394: SYSERR(root): collect: I/O error on connection from smtp.domain1.net, from=<sender@domain1.net>
Feb 29 16:57:46 mail sendmail[13394]: m1T8vk8U013394: from=<sender@domain1.net>, size=20429, class=0, nrcpts=1, proto=ESMTP, daemon=MTA, relay=smtp.domain1.net [203.XXX.XXX.XXX]
 
Old 02-29-2008, 05:54 AM   #2
unSpawn
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Quote:
Originally Posted by tajamari View Post
excel files without macros can be received
How do you attach them? Is there anything on the receiving side that detaches files with macros (Antivirus)?


Quote:
Originally Posted by tajamari View Post
collect: premature EOM: Connection reset by smtp.domain1.net
SYSERR(root): collect: I/O error on connection from smtp.domain1.net
Seems it's just not accepting it. To test if it's AV you could try compressing the sheet and set a password. If it's AV they can't deal with that AFAIK.
 
Old 02-29-2008, 06:38 AM   #3
tajamari
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Quote:
Originally Posted by unSpawn View Post
How do you attach them? Is there anything on the receiving side that detaches files with macros (Antivirus)?

Seems it's just not accepting it. To test if it's AV you could try compressing the sheet and set a password. If it's AV they can't deal with that AFAIK.
Normal attachment only on outlook express, have not tried any other mail clients. I had procmail scripts in place block extensions like vbs, exe, com, jpg only, but even if I removed it on sendmail 8.14.1 it still blocks the attachment excel file with macro, but on sendmail 8.11.6p2, even if my filtering is applied the email with xcel macro attachment was received

I removed the AV installed to isolate if AV was the cause, the setup is just a plain mail server no AV, no ANTI SPAM apps installed.

Its quite weird that 8.11.6 accepts it Was there an implementation to automatically block attchment with macro on later versions, I was looking for docs about this but couldnt find one.
 
Old 02-29-2008, 12:27 PM   #4
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Just like the old snailmail envelope analogy explains e-mail is a "container" and (milters aside) Sendmail only looks at what's *on* the envelope. I'm pretty sure it's something in mail routing but not Sendmail itself.
 
Old 03-10-2008, 05:57 AM   #5
tajamari
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Quote:
Originally Posted by unSpawn View Post
Just like the old snailmail envelope analogy explains e-mail is a "container" and (milters aside) Sendmail only looks at what's *on* the envelope. I'm pretty sure it's something in mail routing but not Sendmail itself.
got the prblem, its on the sonicwall layer 7 filtering. thankx spawn for the feedback.
 
Old 03-10-2008, 06:37 AM   #6
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And thanks back for posting your diagnosis.
 
  


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