How to set the size of a mailbox using the pop3 service

Posted on 2004-09-25
Last Modified: 2010-04-19
Hi all,

I am using the POP3 service which comes with Windows Server 2003 Enterprise edition.
It's working fine but recently I discovered that some mails could not be delivered due to the size of the mails.
They were too big...

I searched in the POP3 help but could not find any information about setting the (default) mailsize.
The only thing I could find was some information on how to set the mailquota. I am NOT looking for this.

The pop3 service is using Encrypted Password Files as authentication.

My question is:
How can I set the maximum size of an email that is coming in?


Question by:roverm
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LVL 27

Expert Comment

by:Asta Cu
ID: 12151610
Wish I could help; have you checked to see if there's an update to the W2003Server?

Does this add any light?;en-us;321045&Product=winsvr2003
LVL 27

Expert Comment

by:Asta Cu
ID: 12151620
Or maybe this?;en-us;842465&Product=winsvr2003

Additional service information returned
PortQry displays extended information that some ports may return. PortQry looks for this "extended information" on ports where the following services listen:
Simple Mail Transfer Protocol (SMTP)
Microsoft Exchange POP3
Microsoft Exchange IMAP4
FTP Publishing Service
ISA Server services
For example, by default, the FTP service listens on TCP port 21. When PortQry determines that TCP port 21 on the destination computer is LISTENING, it uses the information from the Services file to determine that the FTP service is listening on this port.;en-us;832919&Product=winsvr2003
LVL 27

Expert Comment

by:Asta Cu
ID: 12151665
Or perhaps these?
Port Requirements for the Microsoft Windows Server System;en-us;832017&Product=winsvr2003

I'm amazed how tough it is to find these specific issues.  Hmmm...

Will try some more.

It's soooooooooooo great to see you here again!

":0) Asta
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LVL 27

Expert Comment

by:Asta Cu
ID: 12151689
And this..... Synopsis and link:

Configuring disk quotas for the POP3 service Important

You can configure disk quotas only on NTFS NTFS
An advanced file system that provides performance, security, reliability, and advanced features that are not found in any version of file allocation table (FAT). For example, NTFS guarantees volume consistency by using standard transaction logging and recovery techniques. If a system fails, NTFS uses its log file and checkpoint information to restore the consistency of the file system. NTFS also provides advanced features, such as file and folder permissions, encryption, disk quotas, and compression.file system partitions partitions
A portion of a physical disk that functions as though it were a physically separate disk. After you create a partition, you must format it and assign it a drive letter before you can store data on it.
On basic disks, partitions are known as basic volumes, which include primary partitions and logical drives. On dynamic disks, partitions are known as dynamic volumes, which include simple, striped, spanned, mirrored, and RAID-5 volumes.
You can use disk quotas to control and limit the amount of disk space individual mailboxes on the mail server can use. This ensures that individual mailboxes, and the mail store in general, do not use excessive or unanticipated amounts of disk space and adversely affect the performance of the server where the POP3 service is running.

For example, if the mail server suddenly receives a large volume of unsolicited e-mail, the mail store expands rapidly and might use all of the available disk space on the hard disk. If you implement quotas, the mail store only expands to the quota limit that you specified. As a result, no more mail is accepted by the server, and the rest of the server still functions normally.

If you are using Active Directory integrated authentication or local Windows accounts authentication, the e-mail delivered to a POP3 service mailbox will have file ownership assigned to the mailbox user by default. A quota file is created in the mailbox directory that contains the security identifier (SID) of the user account associated with the mailbox. File ownership is then assigned to the user account that corresponds to the SID contained in the quota file. The SID is also used by the NTFS file system disk quota system to enforce the quota limits specified on the user account matching the SID. All e-mail transferred to the mailbox's mail store directory is marked with the SID contained in the quota file; this marks the e-mail so it can be monitored by the quota system.

For more information, see Disk quotas.
LVL 12

Author Comment

ID: 12151735
Hi dearie!
No, none of the links provided me the answer :(
I really "only" need to set the maximum size of individual emails...
LVL 27

Expert Comment

by:Asta Cu
ID: 12151770
Thanks, will try again on another day.  This "should" be so simple.  So happy to try and help you.
":0) Asta
LVL 27

Accepted Solution

Asta Cu earned 500 total points
ID: 12151835
Although this deals with ASPmail, the Email size they note, if large, is the Lookup function.  Think it could apply?

One thing we've found is that by changing the RemoteHost name from a hostname to an IP address can cut 3 or 4 seconds off some messages. Even if the RemoteHost name is set to the local server's name, we've found some messages waiting for the hostname lookup. Just change the address to an IP and you may see an increase in the speed.

Could it be a timeout issue on large messages, you think?  This deals with
HOW TO: Use IPSec Monitor in Windows Server 2003;en-us;324269&Product=winsvr2003
LVL 12

Author Comment

ID: 12151956
Found it!
Open IIS, then open for Default SMTP Virtual Server.
Then select tab "Messages". On this tab you can set the size per email, or remove the limit.

Thanks for your help Asta!

LVL 27

Expert Comment

by:Asta Cu
ID: 12151962
YAY YAY YAY!  I'm sooooooooooooooo happy.

Now I can go rest.  Was still 'looking'.  Thanks for the good news!



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