10/07/2026
Here's a sneaky one that breaks email for businesses that did everything right.
SPF, the record that authorizes who can send email for you, allows a maximum of 10 DNS lookups. Add a few tools (your CRM, your newsletter platform, your booking app) and each one quietly eats into that limit. Cross 10 and the whole record can stop working.
Suddenly your legit email is bouncing or landing in spam, and "nothing changed." The fix isn't adding more. It's flattening and consolidating the record so it stays under the cap.
If you've bolted on a bunch of marketing tools lately, this is worth checking. Ever had email break for no obvious reason?