Emails are bouncing back

I use homestead/Roundcube for my email on this domain timfoleymusic.com

my emails are bouncing back, mostly to gmail.

This is the error I get:

Diagnostic-Code: smtp; 550-5.7.26 This mail is unauthenticated, which poses a security risk to the
 550-5.7.26 sender and Gmail users, and has been blocked. The sender must
 550-5.7.26 authenticate with at least one of SPF or DKIM. For this message,
 550-5.7.26 DKIM checks did not pass and SPF check for [timfoleymusic.com] did
 550-5.7.26 not pass with ip: [66.96.184.2]. The sender should visit
 550-5.7.26  https://support.google.com/mail/answer/81126#authentication for
 550 5.7.26 instructions on setting up authentication. n14-20020a170906700e00b00992a0966793si14061880ejj.814 - gsmtp