; For example to allow all images use "img-src https:". More info at https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy#directives
content_security_policy=""
; Report CSP errors to PHP and/or SnappyMail Log
csp_report=Off
; A valid cipher method from https://php.net/openssl_get_cipher_methods
encrypt_cipher="aes-256-cbc-hmac-sha1"
; Strict, Lax or None
cookie_samesite="Strict"
; Additional allowed Sec-Fetch combinations separated by ";".
; For example:
; * Allow iframe on same domain in any mode: dest=iframe,site=same-origin
; * Allow navigate to iframe on same domain: mode=navigate,dest=iframe,site=same-origin
; * Allow navigate to iframe on (sub)domain: mode=navigate,dest=iframe,site=same-site
; * Allow navigate to iframe from any domain: mode=navigate,dest=iframe,site=cross-site