Escape dollar sign in postfix config file

I have a password for an SMTP relay server with a dollar sign in it. How to enter this into main.cf without postfix thinking it's a variable?

I see nothing here about escaping dollar signs. I randomly tried putting a backslash in front of the dollar sign and double quotes around it to no avail.

Any ideas?


Specify "$$" to produce a single "$" character.

http://www.postfix.org/postconf.5.html