What is the maximum size of messages I can send and receive with Exchange Mail?

Our Exchange system has limits set for each e-mail message that can be sent or received through our mail servers:

Maximum Message Size = 100 MB. This includes the body of the messages and any attachments.

Note: Any binary attachments (images, software, etc.) increase in size by about 30 percent when sent via e-mail, so that needs to be factored in when calculating maximum message size.

Maximum Number of Recipients = 500. An e-mail message cannot be sent to more than 500 e-mail addresses (via
the To, CC, and BCC fields). If you need to send a message to more than 500 recipients, you will have to send it to 500 recipients at a time.

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