Consider the following scenario. In a Microsoft Exchange Server organization, the Exchange Server server has no size restrictions for e-mail attachments and no quota settings on mailboxes. Additionally, size restrictions are set on the firewall.
In this scenario, you may receive non-delivery reports (NDR) when you send e-mail attachments that are larger than a specific size. For example, you may receive an error message that resembles the following error message:
----- The following addresses had permanent fatal errors ----- <email@example.com>
----- Transcript of session follows ----- ... while talking to mail.domain.com.: >>> DATA <<< 552 Requested mail action aborted: exceeded storage allocation 554 <firstname.lastname@example.org>... Service unavailable
Microsoft Exchange 2000 Server Standard Edition, Microsoft Exchange Server 2003 Standard Edition, Microsoft Exchange Server 2003 Enterprise Edition, Microsoft Exchange Server 2007 Standard Edition, Microsoft Exchange Server 2007 Enterprise Edition