Hi, I have a several domains hosted on my droplet like foo.com and bar.com and my server's hostname is like server.foo.com. I have set google services to send and receive emails. But hosted web applications also send emails using those domains (like site@foo.com, admin@blog.foo.com and site@bar.com) from my droplet. I have configured following TXT record at DNS for each domains. @ : "v=spf1 include:_spf.google.com ~all" But I think, this record says that google can send email safely as this domain. So, the e-mails sent from my droplet can still be flagged as spam. How can I include my droplet as a safe smtp server for all hosted domains?