Basic Settings
- Username: Your full email address (e.g., info@your-domain.de)
- Password: The password for your mailbox
Incoming Mail Server (IMAP or POP3)
Server: mail.your-server.de (enter literally as shown)
IMAP (Recommended):
- STARTTLS/TLS: 143
- SSL: 993
POP3:
- STARTTLS/TLS: 110
- SSL: 995
Outgoing Mail Server (SMTP)
Server: mail.your-server.de (enter literally as shown)
SMTP (Sending Emails):
- STARTTLS/TLS: 587 (recommended)
- SSL: 465
- STARTTLS/TLS: 25 (outdated, not recommended)
Other Common Questions and Solutions
Folder Structure Not Displayed Correctly in Outlook
Root folder path: INBOX
In newer versions of Outlook: Press CTRL + ALT + S → Select your group (default is “All Accounts”) → Edit → Mailbox → Account Properties → Advanced → Enter INBOX in the "Root folder path" field.
Connection Issues (Router Configuration)
Some routers use a list of "trusted mail servers". If you experience connection issues, check if mail.your-server.de needs to be whitelisted in your router settings.
Which SMTP Port Should I Use?
- 587: Official port for email clients to send mail; requires authentication.
- 465: Used for SMTPS (SSL), but no longer standard; may cause compatibility issues.
- 25: Used for server-to-server communication; often blocked or restricted by ISPs.
Are My Emails End-to-End Encrypted?
The connection to the mail server is encrypted, but true end-to-end encryption requires the content to be encrypted specifically for the recipient.
This must be configured in your email client using OpenPGP or S/MIME (available in Thunderbird, Outlook, Apple Mail, etc.). For webmail, please refer to your provider’s Webmail FAQ.
Sending Emails from PHP Scripts (e.g., WordPress)
When sending emails from your website, only port 587 is allowed for external mail delivery. Make sure to set all headers properly to avoid spam filters.
Example with PHP mail()
function:
mail('recipient@example.com', 'Subject', 'Message', 'From: sender@example.com', '-f sender@example.com');
If using PHPMailer:
$mail->SetFrom('sender@example.com', 'Name Surname');
More info: php.net/manual/function.mail.php