sending via SMTP is no faster

git-svn-id: https://plugins.svn.wordpress.org/mymail-sendgrid-integration/trunk@999952 b8457f37-d9ea-0310-8a92-e5e31aec5664
Update

git-svn-id: https://plugins.svn.wordpress.org/mymail-sendgrid-integration/trunk@999955 b8457f37-d9ea-0310-8a92-e5e31aec5664