Configuring email-sending devices and apps

It is important to check your configuration when migrating towards Zerospam. Some changes to your multi-function devices or apps settings could be necessary to ensure a smooth transition. This is because Zerospam conforms to the best standards by strictly adhering to the rules that govern sending emails.

This article will walk you through setting up your various devices and apps to avoid common issues.


Device models vary greatly in their configuration. Common cases are presented in a general fashion, but you may need to contact the manufacturer or distributor for further assistance.

Email-Sending Devices and Apps
Common Issues
For Microsoft Office 365 Users

Email-Sending Devices and Apps

Some emails may be blocked if your settings are incorrect. Here is a list of devices and apps whose settings will need to be checked.

  • Multi-function printers (e.g. "print-to-email")
  • Multi-function scanners (e.g. "scan-to-email")
  • Fax
  • Web forms
  • Any app authorized to send emails on your behalf
  • Any provides authorized to send emails on your behalf

Common Issues

Here is a list of issues that may arise during your transition to our service. Please check that your devices and apps are set up correctly to avoid any inconvenience. Of course, if your case is not covered in this article, do not hesitate to reach out to our technical team so that we can quickly provide some assistance. 

Unauthorized IP Addresses

If you have published an SPF record for your domain, it is important to make sure that the IP addresses of email-sending devices and applications are added to it so that the device or application is authorized to send email on your behalf.

Suppose the following SPF record :

  • "v=spf1 -all"

To authorize the printer whose IP address is, it will be necessary to modify the record as follows :

  • "v=spf1 ip4: -all"

Invalid Domain Name

It is also common for emails to be rejected because they are sent from an invalid domain name.

A typical error case is that the default domain name on some devices is Localhost.

Make sure you access the device options and enter a valid email-sending domain name.

Incorrectly Configured Web Forms

In the case of web forms (sent by WordPress for instance), it is important to fill in the address fields in the right way, since a bad configuration could be interpreted as an attempt to impersonate someone else by our filters. 

The email address of the person filling out the form corresponds to the < Reply-to> field, while the < From > field corresponds to the address of the domain sending the form. In the event of a DMARC or SPF test, addresses placed in the wrong field could lead to your messages being blocked.

For Microsoft Office 365 Users

For the configuration of your Office 365 devices, please see this detailed guide directly on Microsoft's website.