Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 267
  • Last Modified:

Exchange 2007 can't mail larger attachements despite changing the settings

Hi everybody,

I'm looking for a sollution to the following issue: I've setup an Exchange 2007 mailserver as part of a small business 2008 server (it's a one server setup). The mailserver is generally working as it should for some months. But from the start users have experienced that they can't send out mails that are generally above 5 mb in size. In the Exchange configuration I've set the send and recieve size for emails to 35 mb, so that should not be the problem.

When a user sends a mail that is above the 5 mb threshold it ends up in the mail queue till that reaches it's time out (set at 2 hours at the moment). The error the queued messages shows is: 421 4.4.2. Connection dropped. I'm asuming this means the error isn't so much in the mailserver itself (the return error isn't about the size of the message at all) but in something else.

The Exchange server is connected to the internet through a Cisco firewall/router.

I'm looking for tips on how to troubleshoot this issue.

Thanks in advance for the help!

Greetings,
Martijn
0
Martijn Snel
Asked:
Martijn Snel
1 Solution
 
paddygreenhoodCommented:
Hi.
How are you sending mail out? From the default smtp connector?
In which case, are you going out through the ISP's smtp without authentication, or authorising via a specific mailserver?
Either way, check thresholds there to make sure they can accept such large attachments.
Patrick.
0
 
lomareeCommented:
Hi

Are you clients connecting to exchange server using https or using microsoft outlook client .
0
 
Martijn SnelICT AdvisorAuthor Commented:
Thanks for the extra questions:

1. I'm using a send connector for the provider; it passes all mail through to the smtp of the ISP. Sending out mail for mail without attachements or with small attachements isn't a problem, so I''m asuming that mailflow isn't obstructuded there.
2. Clients are using Outlook (from Outlook XP to 2003) and I also tested using Outlook Web Access on the server itself with the same result.
0
Creating Active Directory Users from a Text File

If your organization has a need to mass-create AD user accounts, watch this video to see how its done without the need for scripting or other unnecessary complexities.

 
MichaelVHCommented:
Hi there,

Can your users mail such attachments internally without getting any errors?
If so, you should enable SMTP Protocol Logs and check whether it's not the ISP who's dropping the connections when >5MB is being sent.

Grts,

Michael
0
 
AmitIT ArchitectCommented:
It seems your ISP has created rule to filter mails with big attachement. Ask your ISP what limit they have set currently. If mails are sent to a DL with large numbers of users in that DL. You might need to check again with ISP, if they set any limit for recp limit, you might need to ask them to increase these limits
0
 
Martijn SnelICT AdvisorAuthor Commented:
Thanks for the help.. I needed this extra push to solve the problem. Thanks for the accurate sollution!
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now