A test authorization for avmail.alliedvaughn.com to the Let's Encrypt staging service has revealed issues that may prevent any certificate for this domain being issued.
207.67.108.132: Fetching http://avmail.alliedvaughn.com/.well-known/acme-challenge/qf-IPc-gdBjDaiwvJCL_gBiM3ZxFwtuDmjlAsepOInI: Timeout during connect (likely firewall problem)