Internationalized (EAI) mail in fetchmail?

I'm working on a project to see how popular mail software supports
EAI, internationalized mail with Unicode most places that ASCII is
allowed such as e-mail addresses, IMAP folder names, and account names
and passwords.

Looking at the source code I can see there's no EAI support in
Fetchmail but I'm wondering if anyone had looked at it. I'd think it'd
affect the code that picks up mail from POP or IMAP servers, and that
resubmits fetched mail locally by SMTP.

In past years there was no point since there was hardly anyone who
supported EAI, but now a lot of popular open source mail software such
as Postfix and Exim now have EAI support as do big gorillas Gmail and
Hotmail/Outlook and a fair number of regional mail providers in Asia.

Regards,
John Levine, [email protected], Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly