Why are images blocked in my temporary email?
Updated 1 November 2026.
1hemail blocks remote images in formatted mail by default. You can still read message text, switch to plain text and save the original email before the inbox expires.
A remote image is a separate request
Some email images are files hosted on a sender’s server rather than included in the message. Displaying one requires a network request. An image URL can include a recipient-specific identifier, so even a very small image may help its operator infer that a message was opened. A blocked image placeholder therefore does not by itself mean the email failed to arrive.
What 1hemail does when you open formatted mail
The formatted viewer preserves supported headings, paragraphs, tables and links while filtering sender scripts, forms and styling. Remote images do not load until you select Show images. This protects against that image-request route by default; it does not make the sender trustworthy or guarantee that opening a link is private. The plain-text view is useful when you only need a code or short instruction.
When to use Show images
First confirm that you recognise the sender and expected this message. If the image is needed to understand the email, you can choose Show images while the inbox is active. That can contact the image host and reveal connection information. Do not load images solely because a suspicious message tells you to. If a verification code is presented only inside an image, it may not appear as a detected Copy code button; read and enter it manually if appropriate.
Why the layout may look different
A filtered message viewer intentionally omits some original styling and active content. Missing fonts, decorative spacing or background artwork do not necessarily mean the sender’s template is broken. To inspect a template you own, compare the plain and formatted views and download the original .eml. For cross-client rendering, test in the actual mail clients your users use; a safe temporary viewer is not a complete email-rendering laboratory.
Images, attachments and links are different
A remote image is fetched from another host. An attachment is a file delivered inside the email; supported files up to 5 MB each can be downloaded here. A link opens a separate destination whose own tracking and security rules apply. 1hemail does not promise to remove all tracking parameters from links. See attachment and .eml downloads and private inbox access.
How other mail products approach tracking
Different products use different protections. Proton’s official explanation distinguishes tracking images from tracking links and describes its own filtering and proxy approach. That is background reading, not a feature claim for 1hemail. Here, the useful default is simple: leave remote images blocked unless you have a reason to load them.