Office365 Message Size Attachments #office365


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.

Message limits


These limits are applied to every e-mail message. 

Limit Value
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.

Limit Value
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.
  •   Microsoft Live@edu: 1,500   recipients per day*
  •   Office 365 for professionals and small   businesses: 10,000   recipients per day
  •   Office 365 for enterprises: 10,000   recipients per day
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;

About Stephen Pothecary
IT Professional and Cloud Evangelist! IT Manager at Comms Group UK Ltd - Managed Services | Solutions | Procurement | Support Services | Cloud | Fujitsu!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: