Office365 Message Size Attachments #office365
July 29, 2013 Leave a comment
Below outlines the message attachment and email limits for Office365
Message size limit is 25 MB which is the maximum total size of an e-mail message. The total size includes the message header, the message body, and any file attachments.
An e-mail client may limit the size of an individual file attachment to a value much less than the message size limit.
In Outlook Web App, the maximum individual file attachment size is 10 MB.
Therefore, it would not be possible to increase the attachment size that you could send in Office 365 for both Enterprise version and Small Business version.
These limits are applied to every e-mail message.
|Message size limit The maximum total size of an e-mail message. The total size includes the message header, the message body, and any file attachments.Note An e-mail client may limit the size of an individual file attachment to a value much less than the message size limit. For example, in Outlook Web App, the maximum individual file attachment size is 10 MB.||25 MB|
|File attachments limit The maximum number of file attachments allowed in an e-mail message. Even if the total size of all the file attachments doesn’t violate the message size limit, there is still a limit on how many attachments are allowed in the message.||125 attachments|
|Subject length limit The maximum number of text characters allowed in the subject line of an e-mail message.||255 characters|
|Multipart message limit The maximum number of message body parts that are allowed in a MIME multipart message.||250 parts|
|Embedded message depth limit The maximum number of forwarded e-mail messages that are allowed in an e-mail message.|
Recipient and sender limits
These limits are applied to messages, senders, and recipients to combat spam and mass-mailing worms or viruses.
Note For distribution groups stored in the shared address book, the group is counted as one recipient. For distribution groups stored in the Contacts folder of a mailbox, the members of the group are counted individually.
|Recipient limit The maximum number of message recipients allowed in the To, Cc, and Bcc fields.||500 recipients|
|Message rate limit The maximum number of e-mail messages that can be sent from a single e-mail client per minute. The client is identified by the user account.||30 messages per minute|
|Recipient rate limit The maximum number of recipients that can receive e-mail messages sent from a single cloud-based mailbox in a 24 hour period. After the limit has been reached, messages can’t be sent from the mailbox until the number of recipients that were sent messages in the past 24 hours drops below the limit. The recipient rate limit applies to messages sent to recipients inside and outside your organization. For more information, see Bulk E-Mail and Daily Recipient Rate Limits.||
|Forwardee Limit The maximum number of recipients that can be configured for an inbox or transport rule with a redirecting action. If a rule is configured to redirect a message to more than this number of recipients, the rule won’t be applied and any message that satisfies the rule condition won’t be redirected to any of the recipients listed in the rule.||10 recipients|
Further reading can be found from the source of these values below;
- Message and Recipient Limits, help.outlook.com/…/dd630704.aspx