QualiPulse

About connections from probe.qualipulse.tech

If your mail server logged a connection from probe.qualipulse.tech (187.127.135.192), it came from the QualiPulse email verification service.

What it does

It asks a receiving mail server whether it would accept mail for an address: it greets the server, gives the sender verify@probe.qualipulse.tech, names the recipient, and then disconnects.

No email is ever sent. The checker cannot issue the commands that transmit a message (DATA or BDAT).

How it behaves

• At most one connection at a time per domain, at least two seconds apart.
• Temporary refusals (such as greylisting) are retried at most twice, minutes apart.
• It always identifies itself with this name and never changes identity to avoid blocks. If you refuse the check, that is recorded as a refusal and respected.

Opting out

To have your domain excluded from these checks, contact QualiPulse through qualipulse.tech with the domain name. You can also simply reject connections from 187.127.135.192; that is treated as a refusal, never as evidence about any mailbox.