Mailbox provider · CenturyLink Q.com
How to check if a q.com email address exists
Can you verify @q.com addresses?
PartlyPartly. @q.com accepts any recipient, so a single mailbox can't be confirmed.
Check one address
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The checker probes @q.com, but it first offers a random address that can't exist. q.com's server accepts it, so the checker returns the real address as risky with "Accepts all addresses" rather than calling it valid. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
Accepts all addressesCenturyLink Q.com addresses can't be confirmed with a mailbox check. On 4 November 2026 the q.com mail server mxa-001a4401.gslb.pphosted.com accepted a made-up recipient at RCPT TO with 250 2.1.5 Recipient ok, so real and fake addresses get the same answer. Expect q.com results to come back risky (accept-all), not valid or invalid.
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Live DNS snapshot: q.com
Checked 5 November 2026, 03:29 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for q.com goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 10
mxa-001a4401.gslb.pphosted.comProofpoint - 10
mxb-001a4401.gslb.pphosted.comProofpoint
First MX host belongs to Proofpoint.
v=spf1 ip4:107.20.210.250 ip4:52.1.14.157 include:%{ir}.%{v}.%{d}.spf.has.pphosted.com ~allp=reject: meets the requirement and enforces it.
v=DMARC1; p=reject; fo=1; rua=mailto:dmarc_rua@emaildefense.proofpoint.com; ruf=mailto:dmarc_ruf@emaildefense.proofpoint.comLook up any other domain with the MX lookup or the email provider lookup.
CenturyLink Q.com at a glance
| Operated by | CenturyLink (part of Lumen), United StatesSource: CenturyLink privacy notice |
|---|---|
| MX hosts | mxa-001a4401.gslb.pphosted.com, mxb-001a4401.gslb.pphosted.comObserved 4 November 2026 (dig MX) |
| Answer to a made-up address | 250 2.1.5 Recipient ok, returned at RCPT TOObserved 4 November 2026 (SMTP probe of a made-up recipient, no message sent) |
| Who hosts the mail | Customers with a Q.com address have been moved to a new address at MyCtl.net, and Q.com email can no longer be usedSource: CenturyLink help: email address change FAQs |
What CenturyLink Q.com's server says about a missing mailbox
CenturyLink Q.com answered our made-up q.com address with 250 2.1.5 Recipient ok at RCPT TO, the step where a verifier names the recipient. When a server says yes to an address that cannot exist, its yes for your real address carries no information. SimpleVerifier tests a random address first for exactly this reason and returns q.com results as risky with the reason "Accepts all addresses".
Accepting at RCPT TO doesn't mean every message is delivered. Providers that do this usually decide later, after the message is sent, and a missing mailbox then produces a bounce rather than an up-front rejection. That is why accept-all results belong in their own segment: accept-all vs unknown results covers how to treat them.
The MX hosts are on Proofpoint's pphosted.com network, the Proofpoint gateway, which accepted the made-up recipient. CenturyLink's own help says Q.com addresses were moved to MyCtl.net, so a yes here is no sign that anyone reads the address.
CenturyLink retired Q.com addresses
CenturyLink's address change FAQs say customers with a Q.com address have been moved to a new address at MyCtl.net and can no longer use their Q.com email. The domain still publishes MX hosts, and they said yes to a made-up recipient on 4 November 2026, but a yes from a gateway is not a sign that anyone reads the mailbox.
Treat every q.com address on a list as retired. Ask the contact for their new address, and suppress the q.com one rather than mailing it, since a domain its own provider has stopped using is a poor place to send.
Cleaning q.com addresses when the server says yes to everything
Don't delete q.com addresses just because they came back risky; most will be real. Remove what can be proven bad without the mailbox check: syntax errors, typo domains, duplicates and disposable addresses, which the free list health check finds in the browser.
Then send to the q.com segment in a small first batch and watch the bounces. Addresses that bounce as unknown users are gone and should be suppressed; the rest have proved themselves. Engagement history is the other strong signal: an address that opened or replied recently is live whatever the check says. Should you send to catch-all emails? walks through the same approach.
Common questions
- Can you verify @q.com addresses?
- Partly. @q.com accepts any recipient, so a single mailbox can't be confirmed. The checker probes @q.com, but it first offers a random address that can't exist. q.com's server accepts it, so the checker returns the real address as risky with "Accepts all addresses" rather than calling it valid. It always checks the syntax, the domain's MX records, disposable domains and role addresses such as info@ first.
- Can I check if a q.com address exists without emailing it?
- Not reliably. On 4 November 2026 CenturyLink Q.com's server accepted a made-up q.com address at the RCPT TO step, so a mailbox check gets the same yes for real and fake addresses. Verifiers return q.com addresses as risky (accept-all).
- What mail servers does q.com use?
- On 4 November 2026, q.com published these MX hosts: mxa-001a4401.gslb.pphosted.com, mxb-001a4401.gslb.pphosted.com. You can look them up yourself with the free MX lookup tool.
- Should I delete q.com addresses that come back risky?
- No. For q.com, risky reflects how the server treats checks, not the address. Remove the ones that fail format, typo-domain and duplicate checks, then send to the rest in a small batch and suppress whatever hard-bounces.
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