Qualisend verifies email addresses and cleans lists so your messages reach real inboxes and bounces stay low. Ask it to check a single address, a batch, or a whole list — you get a clear deliverable / risky / undeliverable / unknown verdict for each, with typo suggestions and disposable- and role-address detection.
It runs the full check: syntax, domain and mail server (MX), disposable and role detection, catch-all, and a real mailbox (SMTP) check. Large lists run in the background and return a result summary you can review.
On the Pro plan it also checks whether a sending domain is set up correctly (SPF/DMARC), generates the DNS records you need (SPF, DMARC, BIMI, MTA-STS), and analyzes raw email headers to diagnose deliverability. With the Blacklist Monitoring add-on it can check whether a domain or IP is on major blacklists.
Each verification uses one Qualisend credit, and you connect your own Qualisend account.
How to use
- 1Add it in ChatGPT
Open Qualisend in ChatGPT's Plugin directory (button above), select + to add it and sign in if asked.
- 2Use it in a chat
Type @ in the composer and pick Qualisend, or start your message with its name. ChatGPT may also suggest it when it fits what you ask.
Things to ask
- “Verify whether sales@acme.com is a real, deliverable email address”
- “Check if these emails are deliverable and flag the bad ones: jane@gmail.com, info@acme.com, test@notarealdomain123.com”
- “Is acme.com set up to reach the inbox? Check its SPF and DMARC”