Office 365 Recipient Limits – Fighting Spam or Hindering Users?Written by Casper Manes on November 15, 2011
Having been inspired by a post I just read, I want to respond to an article over at ZDNet, where Ed Bott recently posted an article about Office 365 and the recipient limits of the service, titled Small businesses, beware the Office 365 fine print. I also want to discuss what anyone considering outsourcing anything needs to do to make sure there are no surprises.
In his article, Mr. Bott relates a couple of anecdotes regarding customers who are signed up on the Office 365 service, who then find out much to their chagrin that they are only allowed to send emails to 500 recipients per day, per user. He paints the picture of how limiting this is to businesses, including the story of one CEO who tried to send an email “to 400 of the company’s customers and prospects” and then discusses what could happen if a business is featured on a national news show or prominent website, and is unable to respond to customer inquiries.
I usually enjoy Ed’s posts, but find myself compelled to be the voice of reason and paint a fair and balanced picture here for admins considering Office 365, or any other outsourced email service. In the case of Office 365, we are discussing what for most customers is a shared service. All shared services should have limits on resources that can be consumed by a single customer in a set time frame; limiting the amount of resources one tenant can consume is a basic protection for all the other tenants. As a tenant, I want that to make sure another tenant cannot deprive me of the services I am paying for.
For an SMB, a user will hit this 500 recipient limit if they send one email per minute all day, taking only 20 minutes for lunch. That’s a lot of time in email. That is an extreme example, and is highly unlikely. What is likely is that a company, trying to save as much money as possible, starts down the path of email marketing, using the Office 365 service to send out bulk email. That is not what Office 365 is for, and they spell that out in the documentation.
In the specific case of the CEO who could not send email; she was a P1 customer, which is a plan targeted at SMBs with 25 or fewer users, and not designed for bulk mailing. She attempted to send a single email to 400 recipients, and was blocked because of the recipient limits detailed in the Office 365 service, which you can find here. Microsoft specifically discusses this limit being in place to restrict spam and control abuse by users. Whether she had already sent 101 messages that day or 499, she hit the 500 in a 24 hour period. That’s a lot of mail no matter how you slice it.
Now I must admit, I seldom read every single thing that is online about a product or service before I buy it; when I hit a limitation I didn’t know about because I didn’t do my homework, that is my fault. Whether I hit the maximum number of shared minutes on my cell phone plan, or the maximum bandwidth on my hosting plan, I opted to try saving money by choosing a smaller plan. When I hit the limits I can either scale back, or upgrade to a larger plan.
Office 365 has suggestions for companies that wish to send higher volumes of messages, which can be found here. For internal use, they discuss distribution groups, which count as a single recipient. For external use, they suggest using an on-premise mail server. That is probably not an ideal solution for most SMBs, but the service limits are in the documentation and they are designed to be fair to the majority. In a shared service, that is only fair.
In the case of sending an email to 400 users, I would counsel any business to use a bulk mail service for fear that, even if my on premise servers could handle the load, the risk of being flagged as a spammer is too high to chance.
When considering any outsourced solution (colo or cloud, co-tenant or dedicated,) make sure you carefully read all of the service descriptions, including service level agreements, limitations, overage charges, etc. and then consider how they apply to your worst case scenario. There are several reasons why such a service is less expensive than doing it yourself. Limitations are a part of that. You need to consider whether or not your business can function within those limitations, and how to address any exceptions.
Will a small business need to send email to 500 users every day? Unlikely, but knowing about that limitation in advance should have been as simple as reading the documentation instead of just skimming the advertising hype. Knowing what you are buying is the customer’s responsibility. Caveat emptor.