Topic
System Administration
2 posts
DNS MX History: How to Look Up and Recover Past Mail Records
Need to perform a DNS MX history lookup? Discover how to find past domain mail records, track down delivery issues, and reconstruct lost email paths.
May 21, 2026·17 min read
How to Check SPF Record with Dig: The Complete CLI Guide
Learn how to check your SPF record using the dig command-line tool. Troubleshoot email deliverability, audit DNS TXT records, and fix the 10-lookup limit.
May 21, 2026·15 min read