At https://email.tiscali.cz/messageCompose (login required) - the filters for tiscali.cz prevent the form for editing the e-mail from showing. (Using MS Edge browser.)
The relevant hits are:
+604 ##+js(cookie-remover, /^_?adb/) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, document.createElement, adbDetect) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(addEventListener-defuser, beforeunload, ()) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, String.fromCharCode) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, atob) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(cookie-remover, /^_?adb/) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, document.createElement, adbDetect) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(addEventListener-defuser, beforeunload, ()) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, String.fromCharCode) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
+604 ##+js(abort-current-script, atob) email.tiscali.cz dom https://email.tiscali.cz/messageCompose
Note: the filters trigger on tiscali.cz domain, but that includes email.tiscali.cz.
At https://email.tiscali.cz/messageCompose (login required) - the filters for tiscali.cz prevent the form for editing the e-mail from showing. (Using MS Edge browser.)
The relevant hits are:
Note: the filters trigger on tiscali.cz domain, but that includes email.tiscali.cz.
uBlock Origin log
[edit] Follow-up: I have disabled the Javascript filters at email.tiscali.cz:
email.tiscali.cz#@#+js()
.