Email Signature Manager version 8.x
Email Signature Manager version 7.x
Image in email signature is replaced with red X when email is received by the recipient.
The resolution below presumes that the image appears correctly when the email is created, or you should review the alternative article about images being replaced with a red X when email is created in the Problems & Solutions section.
When the option Copy linked images in HTML templates to local drive is enabled in the Deployment Options dialog, make sure to also enable the options Send pictures options and Send pictures from the Internet.
Click Update All in the ribbon to make the service process the changes, and the Email Signature Manager Agent will update the Outlook settings when it next updates for each user.