I'm trying to configure this zoho account to retrieve emails from fastmail via pop3 access. But I get an error:

Invalid Security Certificate for the Server. Please change the incoming port to 110 and retry configuring.

 

For better or worse, fastmail does not allow unsecured connections on port 110, so that's not an option here. The server in question is mail.messagingengine.com which appears to be issuing a valid security certificate. So I'm not sure what the problem is. The full fastmail config details are here: https://www.fastmail.fm/help/technical/servernamesandports.html

I've noticed that there's a lot of other posts in this form explaining the exact same problem. Each time someone from zoho replies "we've generated the certificate for you and now you can connect without issue." So.. could you please do that as soon as possible?