Email server settings
ACTIVE 24 Webhosting SMTP, IMAP & POP3 settings
Use these settings to add your ACTIVE 24 Webhosting account (active24.com, smtp.cz) to Outlook, Apple Mail, Thunderbird, your phone or any app that sends email over SMTP.
Incoming mail
IMAP
- Server
- email.active24.com
- Port
- 993
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
Incoming mail
POP3
- Server
- email.active24.com
- Port
- 995
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
Outgoing mail
SMTP
- Server
- email.active24.com
- Port
- 465
- Security
- SSL/TLS
- User name
- full email address
- Authentication
- Normal password
How to set up ACTIVE 24 Webhosting in a mail app
- Choose add account → manual setup (or "other account") in your mail app.
- Enter your full ACTIVE 24 Webhosting 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 (email.active24.com, port 465) and enable authentication with the same login.
If the login keeps failing, enable IMAP/POP access in the ACTIVE 24 Webhosting web settings and use an app password if your account uses two-step verification.
Email domains using these settings
active24.com, smtp.cz.
Settings from the Mozilla Thunderbird ISP database (MPL 2.0), which mail clients use for automatic setup.
ACTIVE 24 Webhosting email settings: FAQ
What is the ACTIVE 24 Webhosting SMTP server?
What are the ACTIVE 24 Webhosting IMAP settings?
Should I use IMAP or POP3?
Why does my ACTIVE 24 Webhosting login fail in a mail app?
Email validation API
Validate active24.com 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@active24.com
{
"email": "name@active24.com",
"domain": "active24.com",
"mx_found": true,
"smtp_check": …,
"free": …,
"disposable": false,
"state": "…"
}