Re: Holding Large Emails

2 msg	hash table not matching subdomains
18 msg	Non-delivery problem
3 msg	tracing mail
5 msg	different SMTP ip sender in one instance of pos...
18 msg	Three Postfix Errors
10 msg	Conditional relay to a barracuda spam filter
2 msg	Postfix as honeypot
3 msg	postqueue -p
17 msg	Patch to pas all the recipients of a mail to th...
5 msg	Postfix DBD Help
4 msg	Send and receive mail on different ports?
3 msg	postfix behind a router
1 msg	postfix to access mail from external host.
4 msg	Three installation/configuration issues
9 msg	Reject SMTP connection if two RBL match

Holding Large Emails
\ Alex.Pearson (15 Nov 2007)
. \ Terry Carmen (15 Nov 2007)
. . \ Alex.Pearson (15 Nov 2007)

9 msg	Monitor Relaying
7 msg	Sender address rejected when sending messages t...
1 msg	Problem using Postfix with LDAP using STARTTLS
7 msg	resources for 'only virtual domains'

Subject:	Re: Holding Large Emails
Group:	Postfix-users
From:	Alex.Pearson
Date:	15 Nov 2007

Hi Terry,
This looks to be precisely what i'm looking for! Thanks very much
sharing your work!

Alex Pearson

Terry Carmen <terry@cnysupport .com> To Sent by: Alex.Pearson owner-postfix-use cc rs postfix-users Subject Re: Holding Large Emails 15/11/2007 19:18

I ran into this earlier and didn't find a satisfactory solution, so I
wrote one.

It's available for download at: http://cnysupport.com/download/pfshu/

Tuesday, October 30, 2007 2:11 PM 8237 AddMsgSizeHeader <
http://cnysupport.com/download/pfshu/AddMsgSizeHeader>
Tuesday, October 30, 2007 2:11 PM 3743 AddMsgSizeHeader.c <
http://cnysupport.com/download/pfshu/AddMsgSizeHeader.c>
Tuesday, October 30, 2007 2:11 PM 160 Makefile <
http://cnysupport.com/download/pfshu/Makefile>

Download the AddMsgSizeHeader.c file and Makefile.

AddMsgSizeHeader is a binary, complied on Centos (i586) and may or may
not work on your system so I suggest recompiling. There's no
"configure", just "make"

The app runs as a filter, and adds a spamassassin-style X-MessageSize
header containing 1 asterisk (*) for each MB, up to a max of 50, and a
header containing the actual message size in bytes (as a number).
Messages can be any size, however it stops calculating the size after 50MB.

To use it, add

/^X-ActualMessageSizeBytes.*/ WARN
/^X-ActualMessageSize.*\*\*\*\*\*/ HOLD

to your postfix header_checks file. this will hold anything more than
5MB and add a log entry.

You can then release the messages using postsuper -H

It's a C app and has been running flawlessly for several months on a
moderately busy server (15-20K Msgs/day), however your mileage may vary.
If you find/fix any bugs, please let me know so I can update the source.

Author: Terry Carmen -- terry
Released to the public domain 9/21/2007
No warranty or representations of any kind are made.
If you like it or have suggestions, please drop me an email.
It may operate perfectly, or break into your apartment while
you're sleeping, drink all your beer and eat all your cold pizza.

Terry

Alex.Pearson wrote:
> Hi All,
> Hope someone can help with this one. I'm sure it must be quite
> simple (well hopefully).
>
> We have a large number of emails going over a sometimes very
> congested link. So i need to hold emails over a certain size (ie 10mb),
to
> be delivered after 18:00.
> I have used postfix a lot, however have drawn a blank with this,
i've
> searched everywhere i can think of, so any help would be muched
> appreciated..... I presume creating some sort of rule, so that large
> emails are placed in the held queue, and then flushing this queue after a
> certain time?
>
> Again any help appreciated.
>
> Thankyou very much in advance!
>
> Alex Pearson
>
>
>
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--

Terry Carmen
CNY Support, LLC
Web. Database. Business.

315.382.3939
http://cnysupport.com
terry

**********************************************************************
This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed.

Please note that the East Riding of Yorkshire Council is able to, and reserves the right to, monitor e-mail communications passing through its network.

If you have received this email in error please notify our mail manager at postmaster.

Whilst every effort has been made to check for viruses in this e-mail and any attachments, the Council does not warrant that it or they are free of viruses. If in any doubt then please ask for the hard copy.
**********************************************************************