One question that is on every email marketer’s mind is – how many emails should I send to my email list? This is a simple question with multiple answers. Spend some time testing campaigns and you can easily determine when your customers have had enough or when they respond the best.
Day of the Week
Chances are you probably already send emails on different days of the week. If you haven’t already, compile a report showing your email statistics by day. Then compare them to see if any days perform higher than others. It might be helpful to keep both a quarterly and year to date comparison to allow for swings in statistics due to holiday seasons.
If you’re still not sure which day of the week performs the best, try testing a non-time sensitive message. Because this test can take at least a week to deploy, it would be best to use a basic communication or update instead of an offer or sale notice.
First, randomly split your email list into seven segments. If you prefer to test on a portion of your list, make sure that the sample sizes are large enough to produce a significant result. Then send the same email at the same time with the same subject line and creative to one segment per day. Determine the winner from which day had the highest open, click and/or conversion rate – or any other success metric you’d like to use.
Time of Day & Time Zone
Another important testing option for your email campaigns would be the sending time. Most likely, your customers are already getting tons of emails first thing in the morning. If your email falls into the middle, you might not be getting the attention you’d like and your open and click rates might suffer.
Start by selecting a few small segments from your email list to test on – for example, three segments of 10% each would probably be a significant testing group. Then determine the timing for each segment of your email – mid-morning, just before lunch, lunch, just after lunch, early afternoon, etc. Keep in mind how the sending time corresponds to each time zone across the U.S., but if your samples were selected randomly, this shouldn’t pose a problem to your testing. Then send your email at the regular time to 70% of your list and send the remaining segments the email at the test times you determined. Calculate a lift or decrease in the test segment email statistics compared to the regular time statistics to get the winner.
If you have the zip code available for your email list, use them to segment your list according to time zones. Then send your email campaigns at the winning time you determined in the prior test for optimized email statistics and revenue.
Cadence & Frequency
The time between each email is another factor that can be tested to determine whether your customers are satisfied with your email stream. If you feel that you may be sending emails too close together, try withholding small segments of your list and putting them into a separate email stream. For example, if you typically send emails three times per week, choose two small segments of your list to test with. One test group should get two emails per week, while the other gets only one. Continue this pattern for at least a few weeks so that you have an ample amount of time to collect data. Then compare the results of the test groups to the rest of your email list to see if there is any difference in overall email statistics.
If you have the type of business model that calls for multiple emails per day, try setting up the same testing situation. Ensure that there are groups of customers who only receive one email per day, some receive a maximum of two and the main group receiving as many as you like to send. Again, compare the results to your normal situation to determine whether there is a benefit or harm in sending your desired number of emails.
Preference Centers
Setting up a preference center is one incredibly easy way to give customers the exact number of emails they want. You give your customers the option to choose how often you communicate with them – daily, weekly, bi-weekly, monthly – and the types of messages you send. Most ESPs have the functionality to accommodate this, or least the ability to create a rolling suppression list for each of the frequencies you offer.
Choose the messages you send wisely since you will be limiting the contact you have with your customers. Make sure you communicate your most important offers to them in the timeframe you are allotted. If necessary, create separate versions of emails with multiple messages for those who wish to be contacted less. In addition, be sure to offer your customers alternative methods for receiving your messages. Facebook, Twitter and text messages are all popular options you can offer to supplement your emails.
Transactional Emails
Transactional messages such as order confirmations, shipping notices and password resets are all business in nature and shouldn’t be considered part of your marketing stream. In most cases, it is imperative that your customers receive these emails regardless of their opt in status and as many times per day or week as necessary. Testing on this type of email is not recommended unless there is a specific need for it.
Success Metrics
The best indicator of whether your customers have had enough of your email messages is the unsubscribe rate. There will always be a constant churn of email addresses through your list. A major spike in unsubscribes or complaints suggests that customers are not happy with your email practices. If this is the case, try testing cadence and frequency to optimize your email stream.
Open and click rates are also success metrics that prove whether or not your email campaigns are on the right track. If you have designed a strategy that agrees with both your business objectives and your customers, then you should experience solid rates and a steady revenue stream.