==== REQUIRED BASIC INFO OF YOUR IREDMAIL SERVER ====
- iRedMail version (check /etc/iredmail-release):
- Deployed with iRedMail Easy or the downloadable installer?
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

I'm running 1.31 w/LDAP w Nginx.  I'm using LetsEncrypt for my ssl certs.  System has been up and running for quite some time.

In addition to my own domains, I am hosting email on the server for a friend.  He just bought a new Mac (for $2500 if that helps identify it in any way) and can't get his email client (whatever that might be on a Mac) to work.

Before I spend any time on this, are there any gotchas for a Mac where this isn't just some form of user error?  He has had assistance from someone I think is relatively competent, but they were unable to get things working.  It works on his iPhone, but not the Mac.

Thanks.

Andrew