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ARCHIVED: On the Cyrus mail system, what are the size limitations on email messages?

To optimize performance, UITS restricts the size of individual messages (including attachments) that users send or receive to 20MB. For more information, see the Knowledge Base document At IU, what is the maximum size of email messages, and how can I send messages that exceed that size?

If you are using IU Webmail to access your Cyrus account, the maximum file size for outgoing attachments is 14MB. This restriction is an effect of the way that Webmail encodes attachments, which can substantially expand their size. Restricting the size of your attachment to 14MB makes it likely that the entire message, including the encoded attachment, will be less than the allowed 20MB. However, it is possible that even if Webmail accepts an attached file, the file may be rejected at the relays for exceeding the size limit. In these cases, you should attempt to reduce the size of your attachment, or follow one of the other suggestions in the Knowledge Base document At IU, what is the maximum size of email messages, and how can I send messages that exceed that size?

Note: The above limit applies to attachments being sent from Webmail; the Webmail client can view larger attachments if they are received.

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Last modified on January 03, 2008.

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