What does Sendomatic do to ensure delivery?

Sendo Invitations constantly monitors and fine-tunes its ability to get your event emails delivered to your recipients' inboxes. Sendo accomplishes this using an ever-growing set of white-listing methodologies, including, but not limited to:

• Sender Id (or Sender Policy Framework - SPF) - an email authentication technology, used to verify the email sender. Today, spam blockers and email servers are using Sender ID to validate the origin of an email, helping to identify and filter spam, spoofing, phishing or other deceptive email practices.
• Domain Name matching - all of Sendomatic's servers and Domain Name Service-related records - including Address (A) Records, Mail Exchange (MX) Records, CNAME (subdomain name records), Sender Policy Framework (SPF) records are fully compatible with all ICANN requirements and set the DNS records in accordance.
• Reverse DNS (RDNS) turns an IP address into a hostname -- for example, it might turn 192.0.2.25 into host.example.com. Sendo ensures its RDNS records are always up-to-date as certain ISPs (e.g. AOL) use them to block spam.
• Sendo gives its users the ability to choose HTML formatted and/or plain text formatted emails. If your HTML emails are not getting through, we've found that the plain text versions often will. .Email address monitoring - Sendomatic first checks to make sure your recipients' emails are formatted properly. Assuming they are, Sendomatic will attempt to deliver them to the intended recipient. If anything goes wrong in this process, you will be alerted on your 'View Responses' page - and will be given the opportunity to modify the email address as required.