I have dovecot running as a pop3s server on port 995

it works great with sendmail

and

I run nessus to check security issues

nessus reports this

The SSLv2 server offers 3 strong ciphers, but also
0 medium strength and 2 weak "export class" ciphers.
The weak/medium ciphers may be chosen by an export-grade
or badly configured client software. They only offer a
limited protection against a brute force attack

Solution: disable those ciphers and upgrade your client
software if necessary

I have previously disabled weak ciphers in apache

but cannot figure out how to disable the weak ciphers in

dovecot

Any help would be appreciated

john