I have received a non-delivery report (NDR) email with a SPF validation error. How do I resolve this?

NOTE: An SPF record identifies which mail servers are permitted to send email on behalf of your domain.

1. View the header of the email you sent.

For Outlook 2016, double-click the email message to display it in its own full window, select "File" > "Properties" and view the message header in the "Internet headers" field at the bottom of the window.

2. Scan the header text for a mention of "spf=fail".

For example:

3. Check that the IP Address listed next to "sender IP" is a Crossware IP address from this list:

Region: Australia
AUS-EAST - 20.53.98.13
AUS-SOUTHEAST - 13.77.7.165 Region: Australia K1
AUS-K1-EAST - 20.193.18.29
AUS-K1-SOUTHEAST - 20.40.171.203

Region: Canada
CAN-CENTRAL - 52.237.28.198
CAN-EAST - 52.242.38.143

Region: Canada K1
CAN-K1-CENTRAL - 20.200.81.42
CAN-K1-EAST - 52.229.123.246

Region Europe: K1
EUROPE-K1-NORTH - 51.104.160.172
EUROPE-K1-WEST - 51.105.190.74

Region Europe: K2
EUROPE-K2-NORTH - 20.82.209.1
EUROPE-K2-WEST - 20.103.187.44

Region Europe: K3
EUROPE-K3-NORTH - 52.146.155.24
EUROPE-K3-WEST - 20.4.108.96

Region Europe:
EUROPE-WEST - 51.137.107.73
EUROPE-NORTH - 40.113.68.44
EUROPE-WEST (K1) - 20.73.236.16
EUROPE-NORTH (K1) - 51.104.138.178

Region France:
FRANCE-CENTRAL - 20.74.30.236
FRANCE-SOUTH - 52.136.140.66

Region UAE
UAE-K1-NORTH - 40.119.167.158

Region USA
US-EAST - 20.62.137.178
US-WEST - 40.112.165.55

Region: USA K1
US-K1-EAST - 52.149.241.223
US-K1-WEST - 20.184.240.220

Region: All (Only Customers in Production Before 25 Nov 2018)
US - 20.237.102.145
EU - 20.54.134.112
AU - 20.53.139.41

 

If you find spf=fail text with a Crossware IP address, the next step is to confirm that your domain returns an SPF record.

4. Log in to Kitterman SPF Record Testing Tool - https://www.kitterman.com/spf/validate.html
 

 

5. Type in your "Domain Name" and click "Get SPF Record" (if any).

6. Your SPF record should look similar to this example.

It should NOT return a record that includes the text include:o365.crossware.co.nz -all

You will need to update your SPF record to include a list of Crossware Mail Servers as an allowable sender from your domain.

7. Update your SPF record in your DNS to include

Depending on the Region you have been Provisioned in:

NOTE: How to do this for this will vary depending on your configuration - check with your Network Administrator for assistance.

8. Use the Kitterman SPF Record Testing Tool (https://www.kitterman.com/spf/validate.html) again to confirm that include:o365.crossware.co.nz -all appears in your SPF records.

Type in your Domain Name and click Get SPF Record (if any)

NOTE: You will need to allow time for the DNS record changes to propagate which may take up to 24 hours.

9. Send a test email to any external email address to check that your emails are now being sent.