Category
Verifying addresses, removing spam traps, catch-alls and disposables to protect placement.
1163 posts
Verify and validate List-Id headers in transactional emails to improve inbox placement and sender reputation. Test now with MailTester's real-time API.
Find and fix CRLF to LF conversion errors in your email validation API with MailTester’s 98.9% accurate verification.
Ensure your transactional emails render correctly and deliver reliably by testing with real user data before sending.
Learn how to submit proof of false positive email verification errors to providers. Reduce bounces and improve deliverability with accurate, actionable.
Find invalid emails faster with MailTester’s service that scans for c=simple when relaxed is enforced.
Learn how long it takes for a verified email to be removed from a database — and why timing depends entirely on your system, not the verification service.
Learn how MailTester’s email verification platforms identify canonicalization drift caused by JavaScript comments—reducing bounces and improving.
Discover how unverified Bitly links in email footers hurt deliverability. Learn how to test and fix them with real-time verification and inbox placement.
Stop email verification failures due to invalid timestamps in Received headers. Learn how MailTester identifies and resolves this issue with 98.9%.
Learn how to identify and challenge false positive email validation results with deliverability providers.
Learn how to handle email verification for internal domains like .local. Reduce bounces and improve deliverability with real-time checks and accurate.
Ensure your emails work with legacy systems by verifying q= tag compatibility in email headers.
