Yes. You can verify any @Countermail.com address in real time with a direct SMTP handshake that provides 99.7% accuracy. Countermail.com is operated by CounterMail, runs 1 mail server, enforces 3 of 3 authentication standards, and is currently responding to SMTP.
Every check returns one of three clear outcomes so you know exactly what to do with the address.
The mailbox exists and accepts mail. Send with confidence, the address is deliverable.
The mailbox does not exist, is disposable, or will hard-bounce. Remove it to protect your sender reputation.
The server is catch-all or greylisting, so existence cannot be confirmed. Send selectively and watch engagement.
countermail.com publishes 1 MX record. The primary mail exchanger is db1.countermail.com, hosted by countermail.com, and it is currently reachable and answering SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 1 | db1.countermail.com | 5.226.34.35 | Reachable |
220-webmail.countermail.com ESMTP PostfixYes. countermail.com is a valid email provider, operated by CounterMail. Addresses are persistent and real mail reaches a genuine recipient. Individual mailboxes still go stale, so verify each one before you send.
A live SMTP handshake connects to Countermail.com's mail server and asks whether the mailbox exists using the RCPT TO command, without ever transmitting a message. The recipient never sees the check.
Each address runs through 30+ checks including SMTP existence, catch-all detection, role-account filtering, and disposable matching. The same engine has verified billions of addresses since 2012.
Every unverified address is a gamble. Here is what happens when you skip verification and mail a list that has not been cleaned.
Free inboxes get abandoned constantly. Verification drops the dead countermail.com mailboxes before you mail them.
Mistyped countermail.com addresses fail a real SMTP check, so they never turn into a hard bounce.
A clean list keeps your bounce rate low, and a low bounce rate is what protects inbox placement on a big send.
Mailing only live countermail.com addresses raises every rate that matters: opens, clicks, and replies.
Countermail.com is CounterMail, registered through PDR Ltd. d/b/a PublicDomainRegistry.com and first seen May 10, 2008.
CounterMail is a privacy-focused email service based in Sweden, designed to provide maximum email security and anonymity. The service uses diskless servers, OpenPGP encryption, and operates its infrastructure through Swedish ISPs to protect user privacy. CounterMail caters to security-conscious individuals who prioritize encrypted communications and minimal data retention.
countermail.com implements SPF, DKIM, and DMARC authentication for outbound messages. As a privacy-focused provider, CounterMail emphasizes strong encryption and does not log IP addresses. The service supports OpenPGP for end-to-end encryption and uses RAM-only servers to minimize data persistence.
The countermail.com mail servers enforce strict recipient verification and reject messages to nonexistent addresses. The domain does not function as a catch-all. Due to the small scale and privacy focus of the service, inbound mail handling is straightforward, though senders should expect standard SMTP response codes for delivery confirmation.
For reliable delivery to countermail.com users, ensure your sending domain has valid SPF and DKIM records. Messages are subject to CounterMail's spam filtering before delivery. Note that CounterMail users may have PGP encryption enabled, so consider sending PGP-encrypted messages when possible for privacy-conscious recipients.
Upload a CSV or TXT list of Countermail.com addresses to the bulk email verifier. Every address runs through a live SMTP handshake plus catch-all, role-account and disposable detection, and you download a clean list when processing completes. For real-time checks at signup, use the real-time email verification API.
CSV or TXT with one email per line. No formatting needed.
Each Countermail.com address is checked with a live server handshake.
Get a verified list with status codes, risk flags, and catch-all detection.
Pay as you go. No subscriptions, and credits never expire.
Everything about verifying email at this domain.
Yes, countermail.com is a valid free email domain operated by CounterMail. It provides permanent email accounts to users.
No, countermail.com is not a disposable or temporary email provider. It offers permanent email accounts with standard email features.
countermail.com uses mail servers operated by CounterMail. Check the MX records section above for specific server details.
Yes, with proper opt-in consent. Follow email best practices and ensure SPF, DKIM, and DMARC authentication is configured for your sending domain.
Use BulkEmailChecker to verify countermail.com addresses via SMTP checks. Verification behavior varies by provider. Our tool handles provider-specific rate limiting automatically.
Upload a CSV or TXT list to the bulk email verifier. Every address runs through 30+ checks including SMTP existence, catch-all detection, role-account, and disposable matching. Processing time depends on list size.
99.7% accurate using a direct SMTP handshake with countermail.com's mail servers, the same engine that has verified billions of addresses since 2012.
Other free email provider domains we have audited.