Any email client may encounter issues with loading images in emails or collecting link click data. Issues with images and links can seriously hamper engagement.
Additionally, campaign data may be inaccurate if images and links are not properly allowed. Firstup relies on image downloads to track email opens, as well as link clicks to track further engagement.
Individual users in Microsoft Outlook can unblock images from the domain "socialchorus.com", "onfirstup.com", or "onfirstup.eu" as outlined in this Microsoft article.
However, to assure that images and links render for your entire team, we recommend working with your internal technology team that handles email security to allowlist images/prevent images being stripped in emails from the following domains. For Outlook specifically, your internal technology team that handles email security can refer to the Microsoft documentation for adding domains to the Safe Senders List in Outlook.
onfirstup.eu (for EU data center customers)
As assets may be loaded from a variety of subdomains, and we are in the process of shifting from one parent domain to another, we ask that you allow both of the parent domains "socialchorus.com" and "onfirstup.com" (or "onfirstup.eu").
It may also be necessary to allowlist the sender's email address of the Email Alias used.
Email Only Links Expired
If there is an issue with links, a "link expired" error message may appear - links in an email may be "clicked" by a link scanner on the recipient's email server. Some link scanners open links to check that they are safe. This can result in a link click being reported even though the end-user has not clicked any links, the above AllowList instructions should be followed to resolve.
Outlook: Images display the red X
When you are using Microsoft Outlook, images may display a red X instead of the actual image. When you try to download the image you receive the following error:
The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location.
Details on this error and how to fix it can be found in this Microsoft article.