Resources
The AcuityScan blog
Guides on email deliverability, SSL, performance, accessibility, and the issues websites hit most often.
·8 min read·email deliverability · spfWhy your Gmail emails go to spam even though SPF passes
SPF passes but Gmail still sends your email to spam? The problem is usually DMARC alignment, missing DKIM, or domain reputation. Here is how to find and fix it.
Read post
·7 min read·email deliverability · spfSPF flattening: what to do when you hit the 10-lookup limit
Exceeding the SPF 10 lookup limit causes mail to fail authentication silently. Learn how SPF flattening works, when to use it, and safer alternatives to protect deliverability.
Read post
·6 min read·email deliverability · DMARCSPF, DKIM, and DMARC in plain English
The three records that decide whether your business email lands in the inbox or the spam folder, explained without the jargon.
Read post
·7 min read·security · HSTSHSTS: how to enable it without breaking your site
HSTS forces browsers to use HTTPS only, which is great until you accidentally lock out a subdomain that doesn't have a cert. Here is the safe way to enable it.
Read post
·7 min read·performance · core web vitalsCore Web Vitals: what each one actually measures and how to move it
Google's Core Web Vitals decide a chunk of your search ranking and how patient your visitors are. Here is what LCP, INP, and CLS actually measure and how to move them.
Read post