Best TLD for a Newsletter

Your TLD Lives in Every Inbox

Unlike a blog or a portfolio site where the TLD appears only when someone visits, a newsletter domain shows up in the From address of every issue you send. Subscribers see it, but more critically, their mail servers see it. Anti-spam systems evaluate sender reputation at multiple levels, and the TLD is one of the signals they check.

A Hacker News contributor analysing 12 months of mail server logs reported a 7.4-to-1 probability that incoming .xyz email was spam compared to legitimate mail. Another user in the same thread noted that important messages sent from a .xyz domain were landing in customers' spam folders. These observations do not mean every newer TLD is dangerous, but they illustrate that TLD choice has measurable consequences for deliverability — consequences that matter far more for a newsletter than for a static website that never sends email.

The .com extension carries the lowest TLD-level friction in email filtering. It is the default, the expected, the invisible — and for a newsletter, invisible is exactly what you want your domain extension to be.

Extensions to Approach with Caution

Beyond .xyz, several cheap and new generic TLDs have accumulated disproportionate abuse volumes relative to their legitimate registration base. Corporate email firewalls at large enterprises sometimes filter entire TLDs if their internal abuse metrics cross a threshold. If your newsletter targets business professionals — decision-makers at companies with IT-managed email — sending from an unusual TLD adds a layer of risk that no amount of content quality can offset.

The .me, .co and .io extensions occupy a middle ground: they are well-established enough to avoid blanket filtering but less universally trusted than .com. For a newsletter that sends infrequently or targets a tech-savvy audience, these can work. For a daily or weekly send to a broad audience, .com remains the safest foundation.

Run the TLD chooser to evaluate your options — it specifically factors in email use and audience type. If you have already registered a non-com domain for your newsletter, test deliverability to Gmail, Outlook and a corporate Exchange server before launching to your full list. One missed inbox is one lost reader.

The 7.4:1 spam ratio cited here is from a single operator's mail logs shared publicly. It illustrates TLD-level risk, not a universal rate.