[ // IMAP connection: scheme://host:port // Schemes: ssl:// for IMAPS (port 993), tls:// for STARTTLS (port 143). // Required. 'imap_host' => 'ssl://mail.domain.tld:993', // SMTP connection: scheme://host:port // Schemes: tls:// for STARTTLS (port 587), ssl:// for SMTPS (port 465). // Falls back to imap_host if not specified. 'smtp_host' => 'tls://mail.domain.tld:587', // Login name, can be 'email' (full address from identity), 'mbox' (only mailbox part). // Any other value is treated as 'not specified' (default). 'user' => 'email', // Are specified settings locked in interface or not. // Default - false. 'readonly' => true, ], 'another.tld' => [ 'imap_host' => 'tls://mail.another.tld:143', 'smtp_host' => 'tls://mail.another.tld:587', 'user' => 'mbox', ], ];