Can HTTPS be used for the e-mails this site sends?

Any-chance that the website that processes the URL redirects for the “Reply to <user>” buttons sent in the e-mails from this site (to say when someone has replied to you) could be upgraded to support HTTPS please?

Currently, if I open such a link in Edge, it tells me:

“Attackers might be trying to steal your information from url9013.openweb.com .

NET::ERR_CERT_COMMON_NAME_INVALID

This server couldn’t prove that it’s url9013.openweb.com; its security certificate is from *.sendgrid.net. This may be caused by a misconfiguration or an attacker intercepting your connection.”

Whereas in Firefox it simply says:

“You’ve enabled HTTPS-Only Mode for enhanced security, and a HTTPS version of url9013.openweb.com is not available.”

Given this is a tech-orientated website, seems a bit odd not to have valid HTTPS on a server. Web-browsers will eventually transition to HTTPS-only for all sites (except those on your local LAN), so be good to fix this before it eventually just stops working!