Mailbox provider · CenturyLink
How to verify a centurylink.net email address
Can you verify @centurylink.net addresses?
YesYes. @centurylink.net answers mailbox checks one address at a time.
Check one address
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The checker opens an SMTP conversation with centurylink.net'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 confirmCenturyLink addresses can be verified without sending an email. On 13 October 2026 the centurylink.net mail server mx.centurylink.net rejected a made-up recipient at the SMTP RCPT TO step with 550 5.1.1 <…@centurylink.net> recipient rejected, so a mailbox check can tell a missing centurylink.net account from a real one.
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Live DNS snapshot: centurylink.net
Checked 6 November 2026, 12:12 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for centurylink.net goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
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mx.centurylink.net
v=spf1 mx ip4:63.226.138.11 ip4:63.226.138.12 ip4:74.201.140.86 ip4:200.57.160.146/29 ip4:209.67.128.0/23 ip4:74.202.142.0/24 ip4:216.163.188.0/24 ip4:148.235.52.0/26 ip4:187.191.73.0/24 ip4:200.57.141.0/24 ip4:69.49.113.0/24 ip4:74.116.88.0/22 ip4:216.55.172.0/24 ip4:155.70.50.76 include:mail.zendesk.com include:relay.mailchannels.net -allp=reject: meets the requirement and enforces it.
v=DMARC1; p=reject; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]Look up any other domain with the MX lookup or the email provider lookup.
CenturyLink at a glance
| Operated by | CenturyLink (part of Lumen), United StatesSource: CenturyLink privacy notice |
|---|---|
| MX hosts | mx.centurylink.netObserved 13 October 2026 (dig MX) |
| Answer to a made-up address | 550 5.1.1 <…@centurylink.net> recipient rejected, returned at RCPT TOObserved 13 October 2026 (SMTP probe of a made-up recipient, no message sent) |
| Address rule | CenturyLink moved q.com addresses to myctl.net on 21 October 2025, and q.com addresses no longer send or receive mailSource: CenturyLink help: email address change FAQs |
| Address rule | CenturyLink webmail, including for myctl.net addresses, is reached at CenturyLink.netSource: CenturyLink help: email address change FAQs |
| Inactive accounts | CenturyLink email accounts unused for a year are deactivated and all contents deletedSource: CenturyLink help: create an email account |
What CenturyLink'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. CenturyLink answered our made-up centurylink.net address with 550 5.1.1 <…@centurylink.net> recipient rejected. 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. CenturyLink rejected ours, so centurylink.net 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.
CenturyLink deletes mailboxes after a year unused
CenturyLink deactivates email accounts unused for a year and deletes all their contents. It also moved q.com addresses to myctl.net on 21 October 2025, after which q.com stopped sending and receiving mail.
The centurylink.net server rejects unknown recipients at RCPT TO, so a check gives a clear answer. If a list holds q.com addresses from CenturyLink customers, treat them as dead and ask for the new myctl.net address instead.
Cleaning centurylink.net addresses on a list
Because CenturyLink answers honestly, centurylink.net 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 @centurylink.net addresses?
- Yes. @centurylink.net answers mailbox checks one address at a time. The checker opens an SMTP conversation with centurylink.net'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 a centurylink.net address exists without emailing it?
- Yes. A verifier connects to CenturyLink'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 centurylink.net address with "550 5.1.1 <…@centurylink.net> recipient rejected", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does centurylink.net use?
- On 13 October 2026, centurylink.net published these MX hosts: mx.centurylink.net. You can look them up yourself with the free MX lookup tool.
- Why did a centurylink.net 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; CenturyLink gave a clear rejection for a missing mailbox when we tested it.
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