Reloading amavisd to read spamassassin rules

[Alex]

Hi all,

I've discovered that when I use "service amavisd reload" to signal
amavisd to reload the spamassassin rules, it sometimes exits
completely. If I use restart, it works fine.

However, using restart seems unecessary. What is the proper way to
signal amavisd to reload the spamassassin rules?

Is there a kill signal that I can send? Is there a more appropriate
command to use?

Thanks,
Alex