Mailbox provider · o2.pl
How to verify an o2.pl email address
Can you verify @o2.pl addresses?
YesYes. @o2.pl answers mailbox checks one address at a time.
Check one address
Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
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The checker opens an SMTP conversation with o2.pl's mail server, offers a random address first to rule out a catch-all, then names your address at RCPT TO and disconnects without sending. A rejection comes back invalid ("Mailbox not found") and an acceptance valid ("Mailbox exists"). Temporary replies come back risky. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
Mailbox existsMailbox not foundServer would not confirmo2.pl addresses can be verified without sending an email. On 13 October 2026 the o2.pl mail server mx.tlen.pl rejected a made-up recipient at the SMTP RCPT TO step with 550 "…@o2.pl": Podane konto nie istnieje / No mailbox here by that name (#5.1.1), so a mailbox check can tell a missing o2.pl account from a real one.
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Live DNS snapshot: o2.pl
Checked 6 November 2026, 11:12 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for o2.pl goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
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mx.tlen.pl
v=spf1 include:wp.pl -allp=none: meets the requirement, but blocks nothing.
v=DMARC1; p=none; rua=mailto:[email protected]Look up any other domain with the MX lookup or the email provider lookup.
o2.pl at a glance
| Operated by | Wirtualna Polska Media S.A., Warsaw, PolandSource: o2 Poczta terms (Polish) |
|---|---|
| MX hosts | mx.tlen.plObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 "…@o2.pl": Podane konto nie istnieje / No mailbox here by that name (#5.1.1), returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Address rule | An account can have up to 10 aliases, and all mail sent to an alias lands in the main inboxSource: o2 Help: add and remove an alias (Polish) |
| Inactive accounts | WP may end the service and delete the account with its contents if the user does not log in for 180 daysSource: o2 Poczta terms (Polish) |
| Inactive accounts | Once the service ends, WP may let another user take over the former user's addressSource: o2 Poczta terms (Polish) |
| Postmaster rules | o2 asks senders of commercial mail to reach only people who opted in, and prefers double opt-in with a confirmation emailSource: o2 Help: email marketing good practice (Polish) |
What o2.pl's server says about a missing mailbox
The reply that matters is the one to RCPT TO, the step where the checking server names the recipient. o2.pl answered our made-up o2.pl address with 550 "…@o2.pl": Podane konto nie istnieje / No mailbox here by that name (#5.1.1). A 5xx code at that step is a permanent "no such mailbox", which is the same answer a real message would get, so SimpleVerifier marks the address invalid with the reason "Mailbox not found". A 250 at the same step means the mailbox exists and comes back valid.
Before trusting a "valid", a careful verifier also offers a random address that cannot exist. o2.pl rejected ours, so o2.pl is not a catch-all: a 250 for your address is a real signal. Temporary 4xx replies (421, 450, 451) are about the connection, not the mailbox, and come back risky with "Server would not confirm" rather than invalid. Hard bounce vs soft bounce explains why that split matters.
The reply is in Polish and English: "Podane konto nie istnieje" means "the given account does not exist". o2.pl belongs to the same group as wp.pl.
o2.pl addresses can be reissued after 180 days
o2 Poczta's terms let WP end the service and delete an account and its contents after 180 days without a login, and then let another user take the old address. A @o2.pl contact who has been silent for half a year may now belong to someone else.
Aliases deliver to the main inbox, up to 10 per account, per o2's alias help, so one person can appear under several addresses. o2's marketing guidance prefers double opt-in. Re-confirm older contacts instead of relying on an old opt-in.
Cleaning o2.pl addresses on a list
Because o2.pl answers honestly, o2.pl is one of the domains where verification removes bounces before they happen. Drop the invalid results, keep the valid ones, and re-check the risky ones later: a temporary reply on one day often turns into a clear answer the next.
A valid result only means the mailbox exists today. Addresses on an old consumer list go stale as people stop using them, so re-verify before each large send to an aged segment; how often to verify an email list gives a schedule. Upload the CSV to the verifier and download the valid, risky and invalid rows as separate files.
Common questions
- Can you verify @o2.pl addresses?
- Yes. @o2.pl answers mailbox checks one address at a time. The checker opens an SMTP conversation with o2.pl's mail server, offers a random address first to rule out a catch-all, then names your address at RCPT TO and disconnects without sending. A rejection comes back invalid ("Mailbox not found") and an acceptance valid ("Mailbox exists"). Temporary replies come back risky. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
- Can I check if an o2.pl address exists without emailing it?
- Yes. A verifier connects to o2.pl's mail server, names the address at the RCPT TO step and disconnects before sending. On 13 October 2026 the server rejected a made-up o2.pl address with "550 "…@o2.pl": Podane konto nie istnieje / No mailbox here by that name (#5.1.1)", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does o2.pl use?
- On 13 October 2026, o2.pl published these MX hosts: mx.tlen.pl. You can look them up yourself with the free MX lookup tool.
- Why did an o2.pl address come back risky instead of invalid?
- Risky means the server didn't give a permanent answer during the check, usually a temporary 4xx reply or a timeout. It isn't proof the address is bad. Check it again later; o2.pl gave a clear rejection for a missing mailbox when we tested it.
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