Yes. You can verify any @Oi.com.br address in real time with a direct SMTP handshake that provides 99.7% accuracy. Oi.com.br is operated by Oi Telecomunicacoes, runs 1 mail server, enforces 3 of 3 authentication standards, and is currently not 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.
oi.com.br publishes 1 MX record. The primary mail exchanger is mx7.oi.com.br, hosted by com.br, and it is currently not responding to SMTP. Mail is routed through these servers in priority order, lowest number first.
| Priority | Hostname | IP | Status |
|---|---|---|---|
| 10 | mx7.oi.com.br | 177.154.139.187 | No Response |
220 oi.com.br ESMTP Service ReadyYes. oi.com.br is a valid email domain, operated by Oi Telecomunicacoes. 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 Oi.com.br'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 oi.com.br mailboxes before you mail them.
Mistyped oi.com.br 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 oi.com.br addresses raises every rate that matters: opens, clicks, and replies.
Oi.com.br is Oi Telecomunicacoes.
oi.com.br is a Brazilian ISP domain from Oi (formerly Telemar), one of Brazil's largest telecommunications companies based in Rio de Janeiro. Oi provides broadband, mobile, and TV services across Brazil.
oi.com.br implements SPF authentication. Compliant with Brazil's LGPD.
The mail servers validate recipients and reject invalid addresses. The domain does not operate as catch-all.
For delivery, authenticate with SPF. Comply with LGPD.
Upload a CSV or TXT list of Oi.com.br 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 Oi.com.br 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, oi.com.br is a valid email domain provided by Oi Telecomunicacoes to its internet subscribers. It is a legitimate ISP-issued email address.
No, oi.com.br is not a disposable or temporary email provider. It is an ISP-provided email service tied to an internet subscription from Oi Telecomunicacoes.
oi.com.br uses mail servers operated by Oi Telecomunicacoes. Check the MX records section above for specific server details and authentication configuration.
Yes, you can send marketing emails to oi.com.br addresses with proper opt-in consent. ISP email providers apply spam filtering, and addresses may become inactive if subscribers cancel their internet service. Regular list verification is recommended.
Use BulkEmailChecker to verify oi.com.br addresses via SMTP checks. ISP domains may have specific rate limiting or greylisting behaviors. Our tool handles these provider-specific configurations 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 oi.com.br's mail servers, the same engine that has verified billions of addresses since 2012.
Other isp email provider domains we have audited.