[bitfolk] Secure SMTP/Entropy

Hi, Apologies in advance if these are stupid questions... 1) With previous VPS providers, I've found that I've had to symlink /dev/random to /dev/urandom to avoid an issue where SSL/TLS smtp connections would hang for a long time waiting for sufficient entropy to setup the secure connection. Is this something I need to do at Bitfolk too? 2) I've setup postfix (with TLS), and a self-signed certificate. This is fine for my purposes, but I wondered if there was a risk that other relay hosts would be unable to deliver email to my box if they weren't able to validate the certificate? If so, is there a way of forcing other relays to use non-secure connections, while retaining the ability to do authenticated SMTP over TLS? thanks in advance for any help with this! Matt.