Email server settings
a1.net SMTP, IMAP & POP3 settings
Use these settings to add your a1.net account (a1.net, aon.at) to Outlook, Apple Mail, Thunderbird, your phone or any app that sends email over SMTP.
Incoming mail
IMAP
- Server
- securemail.a1.net
- Port
- 993
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
Outgoing mail
SMTP
- Server
- securemail.a1.net
- Port
- 587
- Security
- STARTTLS
- User name
- full email address
- Authentication
- Normal password
How to set up a1.net in a mail app
- Choose add account → manual setup (or "other account") in your mail app.
- Enter your full a1.net email address and password.
- Pick IMAP for incoming mail and enter the server, port and security from the table above.
- Enter the SMTP server for outgoing mail (securemail.a1.net, port 587) and enable authentication with the same login.
If the login keeps failing, enable IMAP/POP access in the a1.net web settings and use an app password if your account uses two-step verification.
Email domains using these settings
a1.net, aon.at.
Settings from the Mozilla Thunderbird ISP database (MPL 2.0), which mail clients use for automatic setup.
a1.net email settings: FAQ
What is the a1.net SMTP server?
What are the a1.net IMAP settings?
Why does my a1.net login fail in a mail app?
Email validation API
Validate a1.net addresses before you send
emailvalidation.io checks syntax, MX records and the mailbox over SMTP, flags disposable, role and free addresses and returns a quality score, in one request.
Read the docs100 free validations every month. No credit card required.
GET https://api.emailvalidation.io/v1/info?email=name@a1.net
{
"email": "name@a1.net",
"domain": "a1.net",
"mx_found": true,
"smtp_check": …,
"free": …,
"disposable": false,
"state": "…"
}