• Considering there are numerous reports of security issues that have been unanswered (issues Security Vulnerability "/_data_/…/storage/cfg/…/…/accounts" #2134 Security Contact for high severity Security Issue #2142 Vulnerability in https://mail.rainloop.net/ #2128 Trying to get in touch regarding a security issue #2117 - that's only for the recent pages of issues, I did not go through the backlog) ;

• That most recent issues that are closed seems to have been closed by their poster, or with help of other users ;

• That some bugs might be linked to downtime of rainloop official server (issues call to http://api.rainloop.net/status/FQDN on login page #2160 AppData call takes longer than 5 seconds #2161) ;

• That the dev team/support account is unresponsive
  ;

• That the code last change (in the repository) is 9 month old ;

everything points to Rainloop being no longer maintained at all.