Sender Policy Framework (SPF) is a technical standard and email authentication technique that helps protect email senders and recipients from spam, spoofing, and phishing. Specifically, it defines a way to validate that an email message was sent from an authorized mail server in order to detect forgery and to prevent spam.
OpenSRS's email service is provided through two clusters, cluster A and cluster B. For both the clusters, please include _spf.hostedemail.com in the SPF record.
v=spf1 include:_spf.hostedemail.com ~all
Email cluster A
Cluster A will use the following new IPs in addition to the existing ones.
|All outbound email for both regular deliveries and filter-only deliveries originates from||188.8.131.52/24||
|All outbound forward and autoresponder traffic originates from||184.108.40.206 (the IP address has matching forward and reverse DNS of forward.hostedemail.com).||
|All migration traffic originates from||220.127.116.11 (fetchmail-snat.a.hostedemail.com).||
Email cluster B
|All outbound email for both regular deliveries and filter-only deliveries originates from||18.104.22.168/24|
|All outbound forward and autoresponder traffic originates from||22.214.171.124 (the IP address has matching forward and reverse DNS of forward.b.hostedemail.com)|
|All migration traffic originates from
Email notifications to registrants
To allow outbound email notifications from OpenSRS sent to registrants on behalf of the reseller, please include registrarmail.net in the SPF record of the domain configured as the technical email address of a reseller account.