README

Displays a small icon after the subject line that displays the (presumed) encryption state of received mails.

• Green lock: TLS1.2 or TLS1.3 with Details
• Blue lock: Internal message from localhost
• Red lock: No encryption

Supported languages:

• English
• Hungarian
• German
• Russian
• Dutch

Configuration

Add the following lines to your config.php:

$config['tls_icon'] = [
    'header_pattern' => '(by <your.mail.server>|from \[127\.0\.0\.1\])',
    'check_pattern' => '\(using TLSv?(1\.[2-3])',
    'local_pattern' => '(mailcowdockerized-dovecot-mailcow-1|127.0.0.1)',
    'tooltip_pattern' =>  '\(using\s(.*?)\s',

];

and change the different patterns to match your mail server:

• header_pattern: Pattern to match the last hop of the mail server (e.g. by mail.example.com)
• check_pattern: Pattern to match the encryption state (e.g. using TLSv1.2)
• local_pattern: Pattern to match the local mail server (e.g. 127.0.0.1)
• tooltip_pattern: Pattern to match the encryption details. Use () to extract details. Tooltip uses the first match (e.g. ...(TLSv?1\.[2-3])...)

Changelog

v1.0.0

• First release

v1.0.1

• Some bugfix
• Add Hungarian language

v1.0.2

• Link bug fix

v1.0.3

• Add IPv6 Support
• Add Dutch Language

v2.0.0

• Replaced icons
• Improved pattern matching
• Added tooltip for encrypted messages
• Improved translations

Screenshots

Encrypted message

Internal message

Unencrypted message

Credits

Original plugin by oszto90 and fork from Takika. I renamed the plugin to match the plugin naming shema and add more pattern to support more mail servers.