NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
grepWin - grepWin is a simple search and replace tool which can use PCRE regular expressions to search for...
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
grep - grep is a command-line utility for searching plain-text data sets for lines matching a regular...
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
dnGREP - dnGrep allows you to search across files with easy-to-read results.