Sorry, you’re absolutely right.
I had HestiaCP 1.0.6 installed and working on Debian 9 and a few days ago I updated to 1.1.0. Previously it accessed through host.domain.tld/webmail with no problems. Since then I had not tested access to webmail. As the above URL is no longer available, I have tried to enter using webmail.domain.tld and those are the results. I have also tried to enter using the links located in “HestiaCp > Mail > Open webmail icon” next to mail domain and “HestiaCp > Mail > Mail Domain > Open webmail icon” next to mail account. The latter sends me to “http: //host.domain.tld/? [email protected]”. Also from “HestiaCp > Mail > Mail Domain > Mail account > http: /webmail.domain.tld” and they all give the same result: “Successs! Your new web server is ready to use” if I delete the web subdomain and the certificate, and “We’re working on it! This site is currently under construction. Please check back soon.” if i create the web subdomain and the certificate.
DNS A record points to the same IP as other working subdomains. The value of “Webmail alias” in “Server > Configure > Mail Server” is “webmail”.
I create and delete the webmail subdomain from “Web > Add web domain” and “Web > Delete icon”. The DNS record always remains.
I don’t see anything useful in the logs, not even the roundcube.
SMTP and IMAP are working in Thunderbird.