Will suggest this to my manager, he loves seeing percentages very much. So much in fact that our OKR for next quarter is to boost our email open rate by 50%. That means from 1% to 1.5%.
If your open rate is that low, you probably should do a very thorough list cleansing. You're probably sending to many, many people who haven't opened your emails in years. You should stop sending to them, which will improve your metrics, in terms of spam filtering.
I would also look at the open rates for new subscribers during their first month on the list -- these should be quite high. If not, then you have much deeper problems to address than the timing of when you send the emails.
But don't do the list cleaning all at once. Instead, do it a little bit every quarter, so you can constantly claim credit for improving email open rates by a moderate amount.
