Your domain has a credit score

In today's Mailbites, we talk about sender reputation, the invisible score mailbox providers keep on you, and the two moments most likely to wreck it overnight.

Now, onto today's story.

The Story

Every domain that sends email has something like a credit score. Mailbox providers, Gmail, Yahoo, Outlook, are constantly watching how people react to your mail, and quietly forming an opinion about whether you're a sender worth delivering to the inbox or a risk worth filtering to spam. You never see the score. You just feel its effects.

Like a credit score, it's built slowly through good behaviour and trashed quickly through bad. Send wanted email to engaged people who open, click, and reply, and your reputation rises. Send unwanted email that gets ignored, deleted, or marked as spam, and it falls. The cruel part is the asymmetry: years of careful sending can be undone by one reckless campaign.

Two moments do most of the damage, and both are avoidable.

The first is buying or blasting a cold list. Someone hands you ten thousand addresses, or you finally email that pile of contacts you "collected" years ago and never mailed. A flood of unknown recipients, high bounces, and spam complaints arrives all at once, and the providers conclude you're behaving like a spammer, because you are. That single send can poison delivery for your genuine subscribers for weeks.

The second is switching email platforms or sending domains without warming up. A brand-new sending domain has no reputation at all, which to a provider is its own kind of suspicious. Move your whole list onto it and blast day one, and you look exactly like a spammer spinning up a fresh domain to dodge a bad one.

The fix in both cases is patience. Warm up gradually: start by sending to your most engaged subscribers, the ones most likely to open and least likely to complain, and increase volume slowly over days and weeks. This builds a track record of positive signals before the riskier, colder portion of your list ever gets a message. It feels slow. It is far faster than recovering from a reputation you torched in an afternoon.

Reputation is earned in small deposits and lost in big withdrawals. Protect it like the asset it is: never blast a cold list, never ramp a new domain from zero, and always lead with the people who are genuinely glad to hear from you.

Until next week,

Ani