Various Email limits in Exchange Online (Office 365)
Exchange Online (Office 365) is a cloud-based email hosting platform. It is one of the most popular email platforms used by individual and business users. However, most users are unaware of the limits on user and tenant levels. This blog will look at the various email limits in Exchange Online (Office 365) and how it impacts users.
Office 365 is one of the most popular cloud service platforms, thanks to its provider, Microsoft. With over 150 million active users, it’s clear that Office 365 can handle a lot of emails — more than a regular email server. However, it’s important to remember that Office 365 has different storage and email/contact limits for other plans. These limits will vary depending on the subscription plan you choose.
Now, let’s start discussing the Mailbox Storage Limits-
The mailbox storage limits for each type, such as a primary mailbox, archive mailbox, shared mailbox, or group mailbox, vary depending on the subscription plan. The table below outlines this information in greater detail.
Note:- These are the subscription plans. However, an Office 376 administrator can reduce these limits according to the organization’s requirements.
However, the message has a few limitations as per the subscription plans. Let’s explore those message limits.
Message Limits:-
Different message limits apply to different aspects of each message, such as message size limit, header size limit, subject length limit, file attachment limit, attachment size limit, multipart message limit, and embedded message depth limit. By keeping these limits in mind, Office 365 administrators can ensure that their message limits according to needs.
When a message is too large for the limit, the recipient won’t get it, but the sender will get a notification. Having this limit saves time from processing large emails and improves the performance of normal-sized emails.
Receiving and sending limits
Exchange limits are designed to protect against spam and phishing messages. By blocking these types of messages, it helps keep the Exchange environment clean and safe.
- Receiving Limits:-
A user, public folder, or group can receive the maximum number of messages in an hour. After exceeding this limit, the mailboxes will not receive any emails for the next hour.
2. Sending Limits:-
There are limits placed on Exchange Online accounts when sending messages. These include
3. Address Book Limits:-
The Address Book limits aren’t just for one mailbox; they apply to the whole Exchange organization. The maximum number of address lists/offline address books/address book policies/global address lists can be created. So if you’re a part of a big company, you might want to keep this in mind when you’re trying to create new lists or policies.
There are some fundamental limits that Office 365 administrators need to be aware of. However, these limits are pretty high, and administrators do not need to pay attention to them as efficient communication can be achieved within the available limits. However, keeping an eye on how Exchange resources are used in the organization is still a good practice. But, compelling Exchange features are not available to monitor the usage of Exchange resources. So, one has to use the Exchange Reporter tool for the same.
The Bottom Line
Microsoft Exchange Online (Office 365) has several email limits to help ensure a high level of email availability and performance. This article is an overview of the most common email limits in Exchange Online (Office 365), including mailbox sizes, the number of recipients per message, and the number of messages per day and hour.
The Exchange Reporter tool can give you in-depth information about how your Exchange Server environment uses resources. This data can help you fine-tune your available resources for better performance.