I have a website where I send out surveys to people who want to take these surveys. They gave me their email address, so they do want to take the survey.
The problem is, our server had malicious code injected into a contact form and that resulted in a blacklisting problems. The blacklisting seems to be resolved, but now I'm trying to do everything I can to help make my emails look cleaner and not spammy. I'm using PHPMailer to send with SMTP authentication.
One important tip I've come across is to include an unsubscribe link. But these people aren't actually "subscribed." They will only be emailed to do a survey one time. So I was wondering if I put a link that leads them to a page explaining why they received the survey (basically remind them they game me their email) and just name it unsubscribe.php? Then I will name the link "click here to unsubscribe." Would that be sufficient?