Attachments above 3mb being rejected

[debsw1]

We have a customer who has been running SBS 2000, ADSL
and Watch Guard Firewall for a number of months now.
This week they stopped being able to receive emails with
attachments of more than 3mb. They have definately been
able to in the past. The email gets bounced back to the
sender with the following message:

This message was created automatically by mail delivery
software (Exim).
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:
Customers Email Address
SMTP error from remote mailer after
MAIL FROM: Senders Email Address SIZE=5496395:
Customers Host Email Address [80.176.255.114]: 552
Requested mail action aborted: exceeded storage allocation

There has been no restrictions applied to the server or
exchange to restrict size etc. Some of the users have
restrictions but this is currently set that cannot send
or receive more than 10mb of attachments. We have tried
changing this setting and it has made no difference.
There ISP feels it is a restriction somewhere on server.

Any help would be appreciated.

Regards
Debbie

 

[markemark]

The only answer is that there is definatly a setting on your server that is limiting the mail boxes. You just need to find it.

 

[debsw1]

They can all send internal emails with attachments of more than 3mb ok.

Debbie

 

[Davetoo]

Have you checked if you have set mailbox size limitations? Not per email, but the overall size of a users mailbox?

I'm Certifiable, not certified.
It just means my answers are from experience, not a book.

 

[debsw1]

Thanks for reply - we haven't set any users mailbox size limitations, we have the problem with every user on the network, some of them their mailboxes are 20mb, others they are 60mb but it doesn't seem to make any difference. The largest mailbox is just over 100mb. The customer is certain they have received large attachments in the past, they are not sure when it stopped working but noticed they couldn't receive a 3mb file last week.

Debbie

 

[Davetoo]

Is the customer receiving email directly from the Internet? or is it funneled through an ISP's email server?

Have you checked the Watchguard to make sure the SMTP filter isn't blocking it? It has a maximum size setting as well.

I'm Certifiable, not certified.
It just means my answers are from experience, not a book.

 

[debsw1]

Thanks for all replies, the problem was a setting for mail size within the Watchguard Firewall, unfortunately our customer had assured us they had received large emails and attachments in the past which they couldn't of done.

Regards
Debbie