Recommend a Friend email, Refer a Friend, Tell a Friend (TAF), Share with a Friend, Forward to a Friend requests, whatever you want to call them, they can negatively impact your email deliverability and online reputation. Generally Tell a Friend links or words encouraging people to Refer a Friend or to share your email with a friend don't really generate much quality traffic, but they sure can bring deliverability trouble. In fact, there are a couple of different ways that exhorting your readers to "tell a friend" can cause you problems.
Address book importing. Odds are good that if you aren't doing it, you are either thinking about doing it, or you know someone who is doing it or thinking about doing it. Because, you see, it's all the rage. It's also an awful practice.
Here's one of those things that impacts email deliverability which can be so subtle, and yet so critical. It can bite you in the back without your realizing it, and then six months later you wonder why you have gangrene in your knees; it can be that difficult to connect the dots. That is until someone points it out to you, and then you have that forehead-slapping moment: of course! And that thing is that setting and meeting subscriber expectations will have a direct and demonstrable impact on your email deliverability (not to mention your email's effectiveness).
It is never ok to repurpose someone's email address - especially by putting it on a mailing list - without their express permission. Even if it were ok (which it isn't), it will cause the recipient to mark your email as spam, and that in itself, when it happens enough, will cause your email to get blocked.
We were stunned when we came across an article by Internet Evolution, suggesting email marketers use Paypal's batch payment function to send mass emails to non-opted-in recipients, with a payment incentive to open the email. The article even states directly, "The sender can simply upload a list of targeted but unknown email addresses and give each a 1 cent payment."
The first true marketing email did not arrive until 1978, when a company called DEC (which became part of Compaq, now HP) sent an invitation to the product launch of a new machine to all addresses in the ARPANET directory on the USA's West Coast. They were heavily criticized for the act, which broke the ARPANET appropriate use policy, and everyone else was reminded of the rule.
We talk a lot about email opt-in here, and you may be wondering "what is a good opt-in definition" or "what is the definition of confirmed opt-in" or even "how does double opt-in work?" (We get all of those questions.) If you are not sure about the exact definition of opt-in when it comes to building email marketing lists or other types of email lists, or the definition of spam, here is a quick review of what each of them mean.
The title of this article, "Not all double- or confirmed opt-in requires a confirmation email" may seen at first like an oxymoron. But it's not.