Images in an email sometimes don't display for a variety of reasons. If your contacts are telling you that they're receiving your email but content isn't displaying properly, a good place to start is to have them check the settings in their email client to make sure that their images are enabled to display:

Gmail

Gmail will automatically display images by serving them through their own secure proxy servers. If images are not displaying automatically, you can manually adjust your settings.

Display images in Gmail:

1. Click the gear icon in the top right corner of the page.
2. Select Settings.
3. On the General tab, click the "Always display external images" radio button.
4. Scroll to the bottom of the page and click Save Changes.

For additional assistance with Gmail, please see Gmail Support.

Outlook (Hotmail / Windows Live)

Display images for individual emails:

1. Open the email.
2. Click Show content at the top of the email.
3. Click "Show blocked content."

Disable image blocking for all messages:

1. Click Settings.
2. Click "View all Outlook settings."
3. Click Mail > Layout.
4. Under the Sender image section, select "Show sender images."

For additional assistance with images in Outlook, please see Microsoft Support.

Yahoo 

Start by opening your email in Yahoo. You have a couple of options:

Display images for individual emails:

1. Open an email.
2. In the "This message contains blocked images" message, click "Show images."

Disable image blocking for all messages:

1. Click Settings > More Settings.
2. Click "Viewing email."
3. Under the Show images in messages section, select "Always, except in spam folder."

For additional assistance with images in Yahoo, please see Yahoo Support.

Outlook 2016

Unblock picture downloads for all messages:

1. Click File.
2. Click Options.
3. Click Trust Center.
4. Under Microsoft Outlook Trust Center, click Trust Center Settings.
5. Uncheck the Don't download pictures automatically in HTML e-mail messages or RSS items check box.

If this doesn't resolve your issue, check if you have text-only emails enabled.

Disable text-only emails:

1. Click File.
2. Click Options.
3. Click Trust Center Settings.
4. Click E-mail Security.
5. Under Read as Plain Text, make sure that the Read all standard mail in plain text is unchecked. 

Outlook Express 6

Unblock images:

1. Open Outlook Express 6.
2. On the Tools menu, click Options, and then click the Security tab.
3. Uncheck the box next to "Block images and other external content in the HTML email."
4. Click on Apply then click OK.

Unblock images while using Internet Explorer:

1. Go to Tools > Internet Options and click the Advanced tab.
2. Scroll down to the "Multimedia" section place a check in the box for "Show Pictures."

For additional assistance with images in Outlook Express, please see Microsoft Support.

Thunderbird

By default, Thunderbird blocks remote images in email messages to help protect your privacy. When you receive a message with remote images, Thunderbird will display an alert stating that remote images have been blocked.

View remote images:

1. Click the Show Images or Load Images button that appears to the right of the alert message.

Allow images from all senders:

1. Click Tools.
2. Click Options.
3. Click Privacy.
4. Click General and make the desired changes.

Enable display of remote images in Thunderbird 2.0:

Global image settings aren't available in Thunderbird 2.0, and all remote images are blocked by default.

1. Open the email.
2. Click "Click here to always load remote images from ..." at the top of the email.

For additional assistance with images in Thunderbird, please see Mozilla Thunderbird Support.