TXT SPF records for different providers

Detailed SPF configuration in Sugester: Sendgrid: ""v=spf1 mx include:u908313.wl.sendgrid.net ~all" Mailgun: "v=spf1 mx include:mailgun.org ~all" Amazon AWS SES: "v=spf1 mx include:amazonses.com ~all" Google Apps: "v=spf1 mx include:_spf.google.com ~all" EmailsLabs: "v=spf mx include:_spf.emaillabs.net.pl ~all" If we send emails through many providers, eg. newsletters with Mailgun and 'regular emails' with Gmail and AWS, we can set as follows: txt = "v=spf1 mx mx include:u908313.wl.sendgrid.net include:_spf.google.com include:mailgun.org include:amazonses.com ~all"