Information Technology Policies and Standards
|E-Mail Maximum Message Size|
|Employee E-Mail Use|
To Be Reviewed
|Applies to all users of the City's Microsoft Exchange e-mail servers.|
This standard will become effective on November 1, 2008.
- Send and Receive e-mail message size is limited to twelve megabytes (12 MB) maximum, including all attachments.
- Any e-mail attachment larger than ten megabytes (10 MB) should instead be posted to a SharePoint site or file share. Should a large file need to be generated to send to external auditors, media or some other entity, file compression should first be attempted. Windows XP offers file compression to a .ZIP file.
|Without message size limits, when someone sends a very large e-mail message, Exchange e-mail servers actually stop processing other messages to digest it and create multiple copies of the message and attachments. Over 99% of all messages from City e-mail servers are smaller than 5 MB, with an average message size of approximately 0.177 MB. Microsoft recommends having a limit in place. This limit will reduce network congestion, increase server performance, reduce backup/recovery time, improve overall e-mail performance levels for all users, and significantly reduce the potential for an outage and/or denial of service (DOS) attack.|
|Contact: Andre O'Brien, (505) 768-2955|