Under the title Optimum Follow-up Frequency for New Leads Samuel Smith, a consultant and blogger on business and online marketing, posted the following advice:
„A good e-mail marketing effort doesn’t inundate your customers with hard sales pitches. Following up quickly is the first step. Schedule your first follow-up email to go out two hours after your customer submits his or her information.
From here, you may want to gradually slow your e-mail frequency and aim for about three content emails for one purely promotional email. Depending on your budget, you could aim, at the high end, for sending four emails a week, but with a smaller budget, you can send an email every two or three days and have similar success.
Once a potential customer has been receiving email from you for a couple of months, it’s okay to drop off the number of emails to once a week. The optimum e-mail frequency reminds customers several times over that your product has value to them.“