Based on our record, Email List Verify should be more popular than Kickbox. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
You can use a service like https://kickbox.com/ to validate and clean your email list. Buy some credits, put your lists through Kickbox, and it will spit out a clean, mailable list that you can begin contacting with confidence, and without worrying that your email address is going to get flagged for spam and whatnot. Source: almost 3 years ago
If you're not getting the right email addresses from ContactOut and it's bouncing back, you could always run the email addresses through something like emaillistverify.com to make sure they're valid before you try to email them. (you should do that always anyway to protect your email deliverability). Source: over 2 years ago
Emaillistverify.com is the service I use. Source: over 2 years ago
NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
DitLead - DitLead is an outbound sales automation and engagement with support for Linkedin Outreach automation, cold emailing, cold calling, CRM and lead management.
BriteVerify - Email Validation & Email Verification reduces bounce rates up to 98%. Rapidly verifying email addresses has never been easier, just drag drop and deliver!
lemlist - Send emails that get replies 💌
Email Verifier - Email verifier app lets you verify email.