Does deleting old contacts always help?

Not always. It depends who you're deleting and why. Blindly wiping everyone who hasn't opened in six months can actually hurt you, not help.

The contacts that are genuinely safe to remove are the ones adding real risk to your sender reputation. Hard bounces should go immediately. Addresses that hard bounce are invalid or unreachable, and mailbox providers notice when you keep mailing them. Same goes for confirmed spam complainers and role addresses (think info@, support@) that never engaged from day one.

Contacts who've been completely silent for 12 or more months and ignored a re-engagement campaign? Those are fair to suppress or remove. They're not contributing to engagement, and continuing to mail them drags your rates down.

But here's where people trip up. Some subscribers who look inactive actually aren't. Apple Mail's Mail Privacy Protection (MPP) pre-loads email pixels automatically, which means opens get logged even when nobody actually opened the email. That makes a real chunk of your list appear active when they're not, and it also makes quiet-but-real readers look inactive. Opens alone are an unreliable signal right now.

Recent purchasers who don't click emails are another group to handle carefully. Someone who bought three times last quarter but never clicks a campaign is still a customer. Their value isn't visible in email metrics.

Seasonally active contacts are also easy to misread. If someone only buys from you in November and you're reviewing your list in March, they'll look disengaged. They're not.

Before any mass removal, run a re-engagement campaign first. Then look at purchase behavior, not just email opens. Suppress rather than delete where possible, so you keep the history and can reverse the decision if needed.

If you want a hand figuring out which contacts are worth keeping and which are genuinely dragging you down, we clean lists and can help you make that call without guessing ;)