If you're building a list, this is the part nobody shows you. I ran a 1,000-contact list through EmailClikVerify and got back 592 good, 225 risky, 183 bad. That's 408 addresses that would have burned my sending domain if I'd just hit send. Upload a CSV, TXT or XLSX (up to 1,000,000 emails), every address comes back scored with the reason, then you download good only, risky only, or the full report. A list I cleaned and re-ran came back 99% good. 1,000 free credits on signup, no card required, credits never expire: https://emailclikverify.com

Your email list is quietly killing your deliverability. Most lists are full of dead addresses, spam traps and risky domains, and every send to them drags your sender reputation down with it. Here's the 3-step fix: 1) Upload your list (CSV, TXT or XLSX, up to 1,000,000 emails). 2) Every address gets scored good, risky or bad, with the reason why. 3) Download the clean list at 99% good, ready to send. I ran 1,000 contacts through it: 592 good, 225 risky, 183 bad. That's 408 emails I would have burned my domain on. 1,000 free credits on signup at https://emailclikverify.com - no card required, credits never expire.