The A1 mail login for private customers sits at webmail-login.a1.net, and A1's own help names A1.net/webmail as the way in. The page asks for the mailbox address and the mail password. A blue "Anmelden" button signs you in, and a link under the box starts the reset. Business customers use a separate page at businesswebmail.a1.net.
This guide walks through both pages, the reset form, the checks A1 suggests when entry fails, aliases, storage and the settings for mail programs. Webmail means reading mail in a browser instead of a program, and what webmail is has a short definition. Every fact about A1 comes from its own sites, read in October 2026. We opened the login pages but did not sign in, and we are not affiliated with A1. BillionVerify is an email verification service, and the last section covers what to check ahead of a mailing to an A1 address.
Key facts (checked October 2026):
- The private page is titled "Anmelden - Webmail 7.0" and offers two fields, an "Anmelden" button and a "Passwort vergessen?" link.
- A1's article on how to log in points to A1.net/webmail, and the login name is the mailbox address or an alias.
- A1's article on storage says a mailbox holds 40 MB by default, which can be extended to 1 GB.
- A1 allows up to five alias addresses on one mailbox.
- A1's settings list gives securemail.a1.net, with IMAP on port 993 (SSL) and outgoing mail on port 587 (STARTTLS).
- BillionVerify's account gives 20 free credits on each day you use it, with no card needed, for checking addresses ahead of a campaign.
Every A1 Login Page in One Table
A1 runs more than one entrance. The right one depends on whether the mailbox belongs to a private contract or to a business product. The table shows what we opened and what A1 states for each name.
| Page | What it is | Who uses it |
|---|---|---|
| webmail-login.a1.net | Page with the A1 logo, headed "Webmail", with two fields and a language menu | Private customers with an A1 mailbox |
| A1.net/webmail | The address that A1's login article gives | The same users |
| businesswebmail.a1.net/webmail | Page offered in German and English | Holders of business mailboxes |
| Business Mailmanager | Admin tool linked from the business side menu | Business customers who reset a password |
| securemail.a1.net | Server name in the A1 settings list | Outlook, Thunderbird and phone mail apps |
The Box on the Private Page
A grey bar at the top carries the A1 logo. Below it, a framed box is headed "Webmail". It holds an "E-Mail" field and a "Passwort" field. The blue button sits under them, and the link "Passwort vergessen?" stands at the right. A menu named "Sprache" under the box is set to Deutsch.
Screenshot: the private A1 Webmail page.
What to Type
The article names two forms of login name. One is the address a1.kundennummer@a1.net, where the middle part is your customer number. The other is an alias that you added yourself. The password is the mail password, which A1 calls the E-Mail-Kennwort. According to A1, both come from the "Kundenschreiben", the customer letter that arrived with the product. Once you are in, the inbox opens.
A Separate Login for Business Mailboxes
Business mailboxes use businesswebmail.a1.net/webmail. The page is headed "A1 Business Webmail" and has fields for the address and the password, a Login button, a "Forgot password?" link and a language menu with Deutsch and English. Its welcome text from A1 Telekom Austria says mails stay reachable anywhere on the internet. It adds that mails can be sent to a phone and that documents can go into file storage.
Screenshot: the business login with its side menu.
A side menu links to the Mailmanager and to product information on A1 Mailboxen. The login name for business mailboxes is the business address, A1 states. Use the business login only for those mailboxes, and the private page for the rest.
How to Reset a Forgotten Password
Private users start at "Passwort vergessen?" under the box. It opens a form headed "Schritt 1: Kontoanmeldung". The form has an address field, a picture with characters, buttons to hear the characters as audio or to reload the picture, and a field named "Zeichen". "Weiter" moves on and "Abbrechen" goes back. We stopped at this step because we hold no A1 mailbox, so we cannot say what the later steps ask for.
Screenshot: step one of the A1 Webmail reset form.
Business Mailboxes
A lost password is handled differently for business users. It is reset in the Business Mailmanager, A1 says. Its credentials are printed in the service overview, which A1 calls the Datenblatt. If that sheet is missing, the article points to the A1 Business Service Center. It adds that the customer password is needed.
After a Reset
A new password has to be typed again everywhere the old one was saved. That includes Outlook, Thunderbird and the mail app on a phone. A program that keeps trying the old password will fail.
When Entry Fails
A1 gives four checks, in this order:
- Check that the name and the password are spelled correctly.
- Check the internet connection.
- Clear the browser history.
- Try another browser. A1 names Internet Explorer, Mozilla Firefox, Chrome and Safari.
"A1 Webmail Is Not Available for This Account"
A separate A1 page bears the title "A1 Webmail ist für dieses Konto nicht verfügbar". It says that to reach an existing mailbox you should sign out and come back with the credentials that belong to it. It also covers addresses from other providers. For those, A1 tells you to use the provider's own site and gives max.mustermann@gmx.at as the example. If your mail lives at GMX, our GMX login guide lists its pages.
Addresses, Aliases and aon
Every mailbox starts with the address built on your customer number. A customer can add a more memorable one, which A1 calls a Wunsch-E-Mail-Adresse or alias. Every message sent to an alias lands in the mailbox it belongs to. The limit is five aliases per mailbox. If you are still choosing a name for a new account, our guide to creating an email address compares the main providers.
Adding an Alias
A1's page on alias addresses describes the steps for a fixed-line internet product:
- Log in to the Mein A1 area.
- Choose your A1 Festnetz-Internet product and click "Details". Skip this if you have only one product.
- Open the menu item Festnetz-Internet.
- Under A1 E-Mail-Adressen, click "Mein E-Mail verwalten".
- Choose the mailbox and click "Bearbeiten".
- Add the new address under "Alias-Adresse(n)".
For an A1 Mobil product, the page sends you to the menu item Einstellungen instead of Festnetz-Internet.
A1 and aon Addresses
Some readers arrive here looking for an aon address. The pages we read describe no separate aon mail login. The only aon page we found on A1's site says that web pages on members.aon.at are no longer available, and that owners can still download their files by FTP for a limited time. That concerns web space and not mail. For any mailbox you are unsure about, the customer letter is where A1 says the credentials are listed.
Settings Inside A1 Webmail
Once you are in, the top menu has an item named "Einstellungen". A1's articles describe three settings there, and the storage size is changed elsewhere.
Storage
A1 gives 40 MB as the default size and 1 GB as the size it can grow to. The change is made outside the webmail, in Mein A1:
- Follow the first four steps of the alias path above.
- In the section "Verfügbarer Speicherplatz pro Postfach", click "Bearbeiten".
- Pick a mail product under "Gewünschtes Mailprodukt wählen" and click "Weiter".
Spam Protection
Under "Spamverdacht" there are two settings. The "Spamerkennungsstufe" decides when a message counts as spam. The "Spammarkierungseinstellung" decides whether spam is only marked or moved to the spam folder. Press "Speichern" to keep the change. A1 adds that "Persönliche Regeln" can send mail from chosen senders, or with chosen words in the subject, to the spam folder automatically.
Out-of-Office Message
Open "Abwesenheitsnachricht", type the text and tick "Abwesenheitsnachricht aktivieren". To switch it off, remove the tick. Press "Speichern" in both cases.
Collecting Mail From Other Accounts
Under "POP3-Sammeldienst" you can add other accounts, and A1 gives GMX as an example. Mail from those accounts then also arrives in A1 Webmail.
Mail Programs and Server Settings
Programs on a computer or phone do not use the browser page. They need server names, ports and a connection type. A1's list of server settings gives values for an encrypted connection, and the table repeats them.
| Fetching with | Incoming server | Port | Connection | Outgoing server | Port | Connection |
|---|---|---|---|---|---|---|
| POP3 | securemail.a1.net | 995 | SSL | securemail.a1.net | 587 | STARTTLS |
| IMAP | securemail.a1.net | 993 | SSL | securemail.a1.net | 587 | STARTTLS |
Screenshot: A1's help page with the server values.
The values depend on whether the connection is encrypted and on whether mail is fetched by POP3 or IMAP. POP3 downloads messages to one device. IMAP keeps them on the server so that several devices show the same folders, and the IMAP specification describes how. The same help section has entries on setting up mail on a phone and on a computer, on creating a new mailbox, and on Mailer-Daemon or Postmaster errors when sending.
Emailing A1 Users? Verify Before You Send
Not everyone reading this guide owns an A1 mailbox. Some of you send to people who do. Addresses at a1.net come in two shapes, the form with a customer number and any alias a customer chose. Aliases are typed by hand, so they are easy to mistype on a sign-up form. A message to a mailbox that does not exist bounces, and bounces count against your sender reputation.
The verifier covers outbound mail, forms, lists and API checks.
BillionVerify's email verifier checks an address before you mail it. What to know:
- valid and invalid results cost 1 credit each, and unknown results are free
- a free re-check is available within 24 hours
- catch-all entries get their own label and are not counted as valid
- the free allowance is 20 credits per day of use, up to 600 a month, and credits never expire
- our servers are in France (EU), and a DPA can be signed
We make no claim about how A1 servers answer checks. If you collect phone numbers at registration, our phone number validator shows whether a number is valid for its country. To trace the owner of an unfamiliar sender, use our reverse email lookup. If you only have a name and a company domain, the email finder returns one verified work address. It is available on paid accounts only, a hit costs 10 credits, and a miss is free.
Readers who also write to Austrian customers of Magenta or Chello can use our Magenta and Chello guide.
FAQs
Where do I find the A1 mail login?
Private customers go to webmail-login.a1.net. The article on logging in also gives A1.net/webmail. Business customers go to businesswebmail.a1.net/webmail instead.
Which login name does A1 Webmail take?
It takes either the mailbox name or a chosen alias. The password is the one printed on the customer letter that came with the product.
What do I do if I forget my A1 password?
On the private page, press "Passwort vergessen?" and fill in the first step of the form. Business users reset it in the Mailmanager and need the customer password for that.
Why can't I get into my mailbox?
A1 lists four checks: spelling, internet connection, browser history and a second browser. If A1 reports that the service is unavailable for the account, log out and return with the mailbox credentials.
How much room does a mailbox have?
The default is 40 MB. It can be raised to 1 GB in Mein A1, under the option for the space per mailbox.
How many aliases can one mailbox have?
Up to five. Mail to an alias arrives in its mailbox.
Can I read other mail accounts in A1 Webmail?
Yes, through the POP3 collection service in the settings. GMX is one account A1 names.
Which server do mail programs use for A1?
The list for encrypted connections names securemail.a1.net. Incoming mail arrives on port 995 for POP3 or 993 for IMAP, and outgoing messages leave through port 587 with STARTTLS.
Watch: How to Export Past Email Finder Results From Find History
Watch: How to Check If an Email Address Is Real (Free Email Verifier)
Top comments (0)