Mailbox provider · Foxmail
How to verify a foxmail.com email address
Can you verify @foxmail.com addresses?
YesYes. @foxmail.com 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 foxmail.com'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 confirmFoxmail addresses can be verified without sending an email. On 4 November 2026 the foxmail.com mail server mx2.qq.com rejected a made-up recipient at the SMTP RCPT TO step with 550 Mailbox not found. http://service.mail.qq.com/detail/122/169, so a mailbox check can tell a missing foxmail.com account from a real one.
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Live DNS snapshot: foxmail.com
Checked 5 November 2026, 03:10 UTCRead from DNS at the time shown and refreshed at most once a day. MX says where mail for foxmail.com goes; SPF and DMARC describe mail sent from it, not whether any one address exists.
- 10
mx3.qq.comTencent (QQ / Exmail) - 20
mx2.qq.comTencent (QQ / Exmail) - 30
mx1.qq.comTencent (QQ / Exmail)
First MX host belongs to Tencent (QQ / Exmail).
v=spf1 include:spf.mail.qq.com ~allp=none: meets the requirement, but blocks nothing.
v=DMARC1; p=none; rua=mailto:mailauth-reports@qq.comLook up any other domain with the MX lookup or the email provider lookup.
Foxmail at a glance
| Operated by | TencentSource: QQ Mail terms of service (Chinese) |
|---|---|
| Same mailbox system | Same qq.com mail servers as qq.comObserved 4 November 2026 (dig MX) |
| MX hosts | mx3.qq.com, mx2.qq.com, mx1.qq.comObserved 4 November 2026 (dig MX) |
| Answer to a made-up address | 550 Mailbox not found. http://service.mail.qq.com/detail/122/169, returned at RCPT TOObserved 4 November 2026 (SMTP probe of a made-up recipient, no message sent) |
| Address rule | The same Tencent terms cover @qq.com, @vip.qq.com and @foxmail.com mailboxesSource: QQ Mail terms of service (Chinese) |
| Inactive accounts | Tencent may end service for mailbox accounts left unused for a long time; no period is statedSource: QQ Mail terms of service (Chinese) |
What Foxmail'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. Foxmail answered our made-up foxmail.com address with 550 Mailbox not found. http://service.mail.qq.com/detail/122/169. 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. Foxmail rejected ours, so foxmail.com 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.
Foxmail addresses are QQ Mail accounts
Tencent's QQ Mail terms cover @qq.com, @vip.qq.com and @foxmail.com mailboxes together, and foxmail.com uses the same mx1 to mx3.qq.com servers as qq.com. The terms allow Tencent to end service for accounts left unused for a long time, without naming a period.
The server rejects unknown users at RCPT TO with a reply that links to Tencent's help, so a check gives a clear answer. Re-check foxmail.com addresses before each large send, since a dormant account can stop working without a published date.
Cleaning foxmail.com addresses on a list
Because Foxmail answers honestly, foxmail.com 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 @foxmail.com addresses?
- Yes. @foxmail.com answers mailbox checks one address at a time. The checker opens an SMTP conversation with foxmail.com'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 foxmail.com address exists without emailing it?
- Yes. A verifier connects to Foxmail's mail server, names the address at the RCPT TO step and disconnects before sending. On 4 November 2026 the server rejected a made-up foxmail.com address with "550 Mailbox not found. http://service.mail.qq.com/detail/122/169", so a missing mailbox shows up as invalid and the owner receives nothing.
- What mail servers does foxmail.com use?
- On 4 November 2026, foxmail.com published these MX hosts: mx3.qq.com, mx2.qq.com, mx1.qq.com. You can look them up yourself with the free MX lookup tool.
- Why did a foxmail.com 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; Foxmail gave a clear rejection for a missing mailbox when we tested it.
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