Sender Policy Framework (SPF)

Sender Policy Framework (SPF) is a technical standard and email authentication technique that helps protect email senders and recipients from spam, spoofing and phishing. SPF defines a way to validate that an email message was sent from an authorized mail server to detect forgery and help prevent spam.

SPF record

The OpenSRS email platform provides service through Cluster A and Cluster B clusters

For both clusters, include the string  _spf.hostedemail.com in the SPF record. For example:

v=spf1 include:_spf.hostedemail.com ~all

Note: For help creating or validating the SPF record, please refer to the SPF creation wizard and the SPF Record Testing Tools pages.

Adding SPF records with SystemDNS nameservers

To add an SPF record for a domain using our systemdns.com nameservers, create a TXT record on the root of the domain:

  1. Log in to the Reseller Control Panel (RCP).
    RCP_Login_page.jpg
  2. Enter the domain name in the search field. 
    RCP_Quick_Search_Field_.jpg
  3. Click Search.
    RCP_Quick_Search_Button.jpg
  4. Click on the domain name from the search results.
    RCP_Domain_Selection.jpg
  5. Click Edit in the DNS section. 
    RCP_SPF_DNS_Edit_Link.jpg
  6. Select TXT from the add record drop-down menu.
    RCP_DNS_Add_Record_Dropdown.jpg
  7. Enter your record in the text field. 
    RCP_SPF_DNS_Record.jpg
  8. Click Save DNS settings.
    RCP_SPF_DNS_Save_Button.jpg

Back to top

Email notifications to registrants

OpenSRS uses the reseller technical contact as the from address for messages to registrants. To ensure message delivery to registrants, please include registrarmail.net in the SPF record of the domain configured as the technical email address of a reseller account. 

include:registrarmail.net

Hosted Email IP addresses

Email Cluster A

Cluster A uses the following IP addresses:

Outbound email for both regular deliveries and filter-only deliveries

64.99.140.1/24
216.40.44.0/24

Outbound forward and autoresponder traffic 64.99.140.10/32
216.40.42.17
Migration traffic

64.99.140.16/29
216.40.42.15

Email Cluster B

Cluster B uses the following IP addresses:

Outbound email for both regular deliveries and filter-only deliveries 64.98.42.0/24
Outbound forward and autoresponder traffic  64.98.36.17 (with matching forward and reverse DNS to forward.b.hostedemail.com)
Migration traffic
64.98.36.15 (fetchmail-snat.b.hostedemail.com)

Back to top

Have more questions? Submit a request

3 Comments

  • Avatar
    Li Cheng
    _spf.hostedemail.com can now be used in place of the IP ranges listed for Cluster A and B above. The SPF record should look similar to the following: v=spf1 include:_spf.hostedemail.com ~all
  • Avatar
    Tugboat Group

    Hello,
    We have the following ip configured on all domains DNS MX A record: 216.40.42.4
    It is not clear to me to which ip address to migrate.
    We are on cluster A as far as I know.

    I'll appreciate your help.

    Thanks.

  • Avatar
    Henry Abey

    @Tugboat Group
    For help with email migrations, please contact the support team directly via https://opensrs.com/why/contact/

Article is closed for comments.