Email Monks, an email design and coding shop, combed through a bunch of studies of email recipients and found 15 truths you probably believe about email marketing but don’t stand up to scrutiny.

For instance…

Subject line is the main reason users choose to open a message.

Studies say sender name has more influence.

Informative content is the sure way to keep readers interested in your messages.

Studies say consumers consistently give “receiving discounts” as their biggest motivation in signing up for email messages from businesses.

Mondays and Tuesdays are the best days to send.

Studies say Mondays, Tuesdays, Wednesdays and Fridays are all pretty much the same for email message open rates.

But the Monks also offer these words of timeless wisdom: Only you can determine what’s myth and reality for your email campaigns by A/B testing send days, subject lines, content and all the other moving parts of email marketing.

(If you can’t read the infographic, click on it and use the magnifying glass thingy to get a bigger view or see the original. If you can read it, the Air Force wants to recruit you.)