Has anyone used an ECC certificate on their SmarterMail server for SMTP communication? Have you noticed any issues with other SMTP servers your server communicates with not understanding them? Will SmarterMail even let me use one? Can they even be used for SMTP at all? I've been using them on web servers for a long time, but I don't know how common ECC support is on other SMTP servers my SmarterMail server might communicate with. I'd feel comfortable using one for webmail, but I don't know about SMTP.

My current RSA certificate works fine, and there's not really a pressing reason to switch other than I'm about to renew it and have the choice. It's more of a curiosity at this point. The smaller key size used in ECC certificates is nice though. I have a small enough user base that I could probably test it for a while and see if me or my users end up not receiving messages they're expecting or if related errors appear in my logs.