Vodafone email checker: does this arcor.de or vodafonemail.de mailbox exist?
In short: Asks Vodafone Germany's mail servers whether an arcor.de or vodafonemail.de mailbox exists, without sending anything, after syntax, domain, disposable and role checks. Limit: A valid result shows Vodafone accepted the mailbox today, not that anyone reads it or that it wasn't reissued.
To check if an arcor.de or vodafonemail.de address exists, enter it here. The checker asks Vodafone's German mail server about the mailbox at RCPT TO, then disconnects before any message is sent. It rejected made-up addresses with 550 5.1.1 … Recipient address rejected: User unknown on 13 October and 8 November 2026, so a missing mailbox comes back invalid and an accepted one valid.
Price: this tool is free. Checking a whole email list is from $9/mo, and the first 100 checks are free with Google, no card. Check your list free nowSee pricing
Tuned for arcor.de, vodafonemail.de. Five checks a minute, no account needed. Nothing is sent to the address — we ask its mail server whether the mailbox exists, then disconnect.
What can a check confirm at Arcor (Vodafone), and what did we measure there? Can you verify an Arcor (Vodafone) address?
Sample result
[email protected] doesn't exist: Vodafone's server rejected it.
- [email protected]
- Reason
- Mailbox not found
- Mailbox check
- SMTP, nothing sent
What this means for you
Invalid means remove it; a real mailbox would come back valid.
- Asks Vodafone's server at RCPT TO
- Catch-all test with a random address first
- Catches typo domains with no mail server
- Flags disposable and role addresses
- Vodafone
- arcor.de
- vodafonemail.de
By SimpleVerifier Team · Last updated
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How do I check a whole list of Vodafone and Arcor addresses?
- Export the list as a CSV or copy the email column; Vodafone and Arcor rows and every other domain can go in together.
- Upload or paste it at /verify. The first 100 email checks are free with a Google sign-in, no card.
- For every list after that, Pro includes unlimited email verification. Fair use: the first 100,000 checks a month at full speed, then slower, never cut off.
How do I check a Vodafone or Arcor email address?
- Type or paste one address, such as
[email protected]or[email protected]. - Press Check. The tool checks the syntax and domain, asks Vodafone's server about a random address that can't exist, then about yours, and disconnects before anything is sent.
- Read the verdict: valid means Vodafone accepted the mailbox and rejected the made-up one, invalid means it said the user is unknown, risky means the check didn't get a clear answer.
- If it comes back risky, check again later: with Vodafone that is usually a cut-short check, not a bad address.
Example
- You enter
- One address:
[email protected]. - You get
- Valid when Vodafone accepts the mailbox after rejecting a random address; invalid ("Mailbox not found") when it answers
550 5.1.1 … User unknown; risky only when the check gets no clear answer. - Limits
- Five checks a minute per IP address, one address at a time, no account needed.
How do I check if an arcor.de or vodafonemail.de address exists without emailing it?
Ask Vodafone's mail server instead of the mailbox. On 8 November 2026 both arcor.de and vodafonemail.de published the MX hosts mx3.vodafonemail.de and mx5.vodafonemail.de. On 13 October 2026 they answered a made-up arcor.de address at RCPT TO with 550 5.1.1 … Recipient address rejected: User unknown, and on 8 November a fresh made-up address on each domain got the same rejection through this checker.
So a single Vodafone or Arcor mailbox can be confirmed: a rejection comes back invalid ("Mailbox not found") and an acceptance valid. The Arcor provider page has the full DNS snapshot.
Why do arcor.de addresses go dead?
Arcor is a legacy brand on Vodafone E-Mail & Cloud. Vodafone's help page says the same server settings apply to Vodafone, Arcor, Kabel Deutschland and Unitymedia mail accounts, and that one account can have up to 10 addresses on @vodafonemail.de.
Section 5 of the Vodafone E-Mail & Cloud terms says stored content is deleted 14 days after termination takes effect, and that Vodafone may give a registered address to another user 180 days after the contract ends. An arcor.de address closed long ago may belong to someone else now. Re-check German lists, for example with the bulk verifier; the WEB.DE email checker and T-Online email checker cover other German domains.
What can this checker confirm at Vodafone?
Each row is something the check runs on a Vodafone address, and the result you can get from it.
| Check | Can we confirm it? | Result when it fails |
|---|---|---|
| Syntax (the address is written correctly) | Yes | Invalid |
| Domain and mail server (MX) | Yes | Invalid, with a typo suggestion where one fits |
| Disposable or role address | Yes | Invalid (disposable) or risky (role) |
| The mailbox exists | Yes: Vodafone answers at RCPT TO (550 5.1.1 User unknown) | Invalid, "Mailbox not found" |
| A temporary reply or timeout | No answer to read | Risky, worth checking again later |
| Someone reads the inbox | No checker can | Use opens, replies or a small first send |
Our checking server offered a made-up address and disconnected without sending, through this checker on 8 November 2026; earlier checks are dated in the text.
Who uses this tool, and for what?
- German shops and newsletters
- Drop closed arcor.de and vodafonemail.de mailboxes before a campaign.
- Support teams
- Catch a mistyped address, or a typo domain like arcor.dee, before you reply.
- Lead buyers
- Confirm a handful of German ISP contacts before paying for or importing a list.
What can’t this tool tell you?
- A valid result shows Vodafone accepted the mailbox today, not that anyone reads it or that it wasn't reissued.
- A temporary reply or a refused connection comes back risky, not invalid.
- Vodafone doesn't publish how its servers answer mailbox checks; the handling here is from our own checks, which can change.
- One address at a time, five a minute.
Common questions
- How do I check if an arcor.de email address is valid?
- Enter it here. The checker confirms the syntax and mail server, then asks Vodafone's server about the mailbox without sending. Vodafone rejects addresses that don't exist, so a missing mailbox comes back invalid.
- Is Arcor email run by Vodafone?
- Yes. Vodafone's help says its E-Mail & Cloud settings apply to Arcor accounts, and on 8 November 2026 the arcor.de MX hosts were under vodafonemail.de.
- Can an old arcor.de address be given to someone else?
- Vodafone's E-Mail & Cloud terms say it may give a registered address to another user 180 days after the contract ends.
- What does 550 5.1.1 User unknown mean from Vodafone?
- Vodafone's server said the mailbox doesn't exist. Treat it as a hard bounce and remove the address.
- Is this checker free?
- Yes, five checks a minute with no account. For a whole list, sign in with Google for 100 free email checks, no card, or use a monthly plan.
Sources
That was one address. Most people have a list.
The free checker does five addresses a minute, one at a time — fine for spot-checking, useless for a CSV of 40,000.
- Upload a CSV up to 100,000 rows
- Valid, risky and invalid exported as separate files
- Repeat checks free for 14 days, no new connections
Plans from $9 a month, cancel anytime, no contract. Sign in with Google and your first 100 email checks are free, no card. The free tools stay free either way.