Free MxToolbox Alternatives: Email and DNS Tools Compared (2026)
Free MxToolbox alternatives compared from their own pages (7 Oct 2026): dnschecker.org, EasyDMARC, PowerDMARC, dmarcian, mail-tester and more, plus which srvScripts tool covers each task.
October 6, 2026
SMTP Bounce Explainer: What Your Bounce Message Means
Paste a bounce or SMTP error and get the meaning of its status codes, the likely cause and the fix, including Gmail, Microsoft and Spamhaus messages.
October 6, 2026
SPF Lookup Counter: Check the 10 DNS Lookup Limit
Count every DNS lookup in a domain's SPF record against the RFC 7208 limit of 10, find void lookups, duplicates and dead terms, and get a trimmed or minimally flattened record.
October 6, 2026
Find a DKIM Selector: Headers, Panel Defaults and Key Checks
Find a domain's DKIM selector from the DKIM-Signature header, the cPanel, DirectAdmin, Microsoft 365 and Google defaults, and check that the published key is valid.
October 6, 2026
Gmail and Yahoo Bulk Sender Requirements: 2026 Host Checklist
Gmail and Yahoo bulk sender rules for 2026: the 5,000-a-day threshold, SPF, DKIM, DMARC alignment, one-click unsubscribe, 0.3% spam rate and a host checklist.
October 6, 2026
BIMI VMC vs CMC: Requirements, DMARC and Which Inboxes Show Logos
BIMI VMC vs CMC compared: trademark vs 12-month prior use, DMARC enforcement, SVG Tiny PS rules, and which mailbox providers (Gmail, Yahoo, Apple) show the logo.
October 6, 2026
Employee Offboarding Checklist: Secure AD, M365 and Workspace Steps
A practical leaver checklist covering Active Directory disable and group cleanup, Microsoft 365 session revocation and mailbox conversion, Google Workspace suspension and data transfer, Zoho user deactivation, plus shared credentials, devices and verification steps.
September 29, 2026
Migrate cPanel Email to Google Workspace: 2026 Reliable IMAP Migration
Move mailboxes from a cPanel server to Google Workspace using the Data Migration Service over IMAP, including source server preparation, user mapping with a CSV, the delta run before MX cutover, and verification that folders and messages arrived intact.
September 29, 2026