Cleanse your lists before you send. GrowZen's 4-layer verification engine (syntax, MX/DNS, DMARC, and a live SMTP probe) catches invalid and catch-all addresses to prevent bounces and protect your sender reputation.
Sending emails to non-existent addresses (Hard Bounces) is the fastest way to get your domain blacklisted. Most providers monitor your bounce rate—exceed 2% and your deliverability will plummet.
GrowZen doesn't just check syntax. We perform a deep hygiene audit on every email address:
Pinging the mail server to confirm the mailbox is active without sending a real email.
Ensuring the domain is configured to receive mail and isn't on a known blacklist.
Identifying servers that accept all mail, allowing you to score lead quality.
You can upload CSV or Excel files with up to 50,000 leads. GrowZen will process them in the background and notify you when your clean list is ready for download or export to a campaign.