SPF Record Configuration when using your ISP's SMTP Server

Email Services
You may choose to use the SMTP Server of your local Internet Service Provider (ISP) for sending Emails. Here are some reasons why:
  1. Sometimes ISP's block outgoing SMTP connection (Ports) so you can not directly send Email outside of their network. This is to prevent possible SPAM emails originating from their network. In this case, your only option may be to use their SMTP server to send out Email.
  2. Sending Email through your ISP's SMTP server may be faster since their server is local while our Email server is in the USA.
If you are using any SMTP server than our Email server, an important change must be made in your hosting control panel. This is because our system uses the Sender Policy Framework (SPF) that by default designates our Email server as the only authorized server for sending Email from your domain.

In other words, if you use a third party (your ISP's) SMTP server, your Emails may be rejected by the recipient since it originated from a server that is not authorized (by SPF) to send Emails for your domain name.

To avoid this issue, add your ISP's SMTP server to the SPF record as authorized to send email for your domain.

First, you need to know the IP Address or Host name of the SMTP Server you would like to use.
  1. Locate the SPF DNS record:
    1. Log into your Hosting Control Panel
    2. Select the Hosting Package (Space)
    3. Select Domains from from the left Menu, the domains in your account will be shown.
    4. Click on the domain name, and on the following Page, click on 'DNS Zone Editor' button.
    5. On the next page, a list of DNS records will be displayed, locate the TXT record that starts with v=spf1, and click on the small 'Edit' icon on the left to edit this record.
    6. Here is an example SPF record: v=spf1 a mx a:mail.sineris.com -all
  2. Add the SMTP Server to the record:
    1. To add the IP Address, use ip4:<address> format. Lets assume that the IP address of the SMTP Server is:, the above record should look as follows:
      v=spf1 ip4: a mx a:mail.sineris.com -all
    2. To add the Host name, use a:<hostname. format. If the SMTP server Host name issmtp.yourisp.com, the record should look as follows:
      v=spf1 a:smtp.yourisp.com a mx a:mail.sineris.com -all
  3. Save the SPF Record.
SPF records are DNS records, and DNS records may be cached by other DNS servers, so the changes you make may take some time to propagate across the Internet.

Here is the syntax reference for SPF records: http://www.openspf.org/SPF_Record_Syntax

  1. If you do not see the 'DNS Zone Editor' button on the domain details page, it may not be available in your hosting package. Please contact Server Support about making changes to your SPF record.
  2. If you do not find any SPF record in the DNS record list, it may be because it had been removed for your domain for some reason. You can contact Server Support if you would like to find out more about it.
  3. You can remove the SPF record altogether to disable SPF for your domain name, but we do not recommend it.

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