EDVRFY verifies email addresses so senders reach real inboxes.
If you found this page from a reverse-DNS lookup, a connection log, or an
HELO/PTR record, you're in the right place. The IP addresses
associated with edvrfy.com run our automated email-verification
service. This page explains exactly what those servers do, how they behave, and how
to reach our operations team.
What EDVRFY does
EDVRFY is an email address verification service. Our customers use it to confirm, before they send, whether an email address is valid and able to receive mail. This reduces bounces, protects sender reputation, and keeps mailing lists clean. We do not send marketing or bulk email of any kind.
Validate deliverability
We check whether an address exists and can accept mail — without ever delivering a message to the recipient.
Protect sender reputation
By removing invalid, malformed, and non-existent addresses, we help legitimate senders avoid bounces and spam traps.
Respect your mail server
Our probes are lightweight, rate-limited, and stop early. We never brute-force addresses or harvest data.
How it operates
A verification check is a short, standards-compliant SMTP conversation. Our servers behave like any well-configured mail transfer agent and disconnect as soon as they have an answer.
Syntax & domain checks
We first validate the address format and confirm the domain has valid MX records — most invalid addresses are caught here, with no connection to your server at all.
SMTP handshake
For remaining addresses, we open a standard SMTP connection, present a valid HELO/EHLO identity and MAIL FROM, and issue a single RCPT TO to ask whether the mailbox is accepted.
Read the response — then stop
We record the server's acceptance or rejection code and immediately issue QUIT. No DATA command is ever sent and no message is delivered.
Rate-limit & back off
Connections are throttled per destination, honor greylisting and temporary failures, and back off automatically. We respect deny signals and do not retry aggressively.
Technical & compliance details
Reference information for postmasters, abuse desks, and network operators. If you need details specific to an IP you've observed, contact us and include the address and timestamps.
| Service domain | edvrfy.com |
|---|---|
| Reverse DNS (PTR) | All sending hosts publish PTR records under *.edvrfy.com with matching forward (A) records. |
| HELO / EHLO identity | Hosts identify with a fully-qualified *.edvrfy.com hostname consistent with their PTR. |
| IP ranges | Published and kept current — request the authoritative list via ops@edvrfy.com. |
| Mail sent | None. Verification never issues DATA; no message body is transmitted to any recipient. |
| Rate limiting | Per-destination throttling with automatic back-off; greylisting and 4xx responses are honored. |
| Data handling | We process only the addresses submitted by customers for the purpose of verification, in line with GDPR/CCPA. We do not sell address data. |
| Opt-out / suppression | Domain owners may request that their infrastructure be excluded from checks — email ops@edvrfy.com. |
| Abuse & delisting | Report issues or request IP delisting at ops@edvrfy.com; we respond promptly. |
Contact us
Questions about traffic from our IPs, opt-out and suppression requests, delisting, or general inquiries — send us a message. It goes straight to our operations team at ops@edvrfy.com.
Operations team
Email: ops@edvrfy.com
Web: edvrfy.com
What to include
For the fastest response, include the observed IP address or hostname, the date and time (with timezone) of the activity, and any relevant log lines or SMTP response codes.