While the UI email systems allow sending and receiving 150mb email messages (including attachments), other external email systems continue to have smaller limits.
This limit helps prevent overconsumption of system resources by a single sender. Message rate limit Message rate limits determine how many messages a user can send from their Exchange Online account within a specified period of time.In a personal distribution list, each recipient is counted separately. Recipient limit This is the maximum number of recipients allowed in the To:, Cc:, and Bcc: fields for a single email message.įor the purposes e purposes of the recipient rate limit and the recipient limit, a distribution group that is stored in the organization's shared address book counts as one recipient.These limits are applied per-user to all outbound and internal messages.Ĭustomers who need to send legitimate bulk commercial email (for example, customer newsletters) should use third-party providers that specialize in these services. Recipient rate limit To discourage the delivery of unsolicited bulk messages, Exchange Online has recipient limits that prevent users and applications from sending large volumes of email.For distribution groups stored in the Contacts folder of a mailbox, the members of the group are counted individually.
Sending limits apply to the number of recipients, number of messages, and number of recipients per message that a user can send from their Exchange Online account.įor distribution groups stored in an organization's address book, the group is counted as one recipient. After one hour, the limit will refresh and the mailbox will once again be able to receive messages. When the receiving limit has been exceeded, any emails sent to that mailbox will receive a non-delivery report stating that the mailbox has exceeded the maximum delivery threshold. This applies for both messages received from the Internet and from on-premises servers. Receiving limits apply to the number of messages that a user, group, or public folder can receive per hour. Receiving limits - 3600 messages per hour For example, if you customize your settings for a 100 MB maximum message size, you can send messages no larger than 75 MB. OWA accounts for the possibility that your message may be subject to the 33% encoding increase and restricts the size of message you can send to 25% less than the configured setting. Messages that are routed outside of the Office 365 datacenters are subject to an additional 33% translation encoding increase, in which case the maximum message size is 112 MB. You can send and receive up to 150 MB messages between Office 365 users (where the message never leaves the Office 365 datacenters).
#Office 365 bulk email limits for mac
Size limit for encrypted messages (for subscribers using Office 365 Message Encryption legacy version)įile attachment size limit - Outlook for Mac Size limit for encrypted messages (for subscribers using Office 365 Message Encryption with new capabilities)
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