When you upload an image or document to your Mailpro account, the original filename is replaced by a unique random string before the file is saved. This is a deliberate, technical choice — not a bug — designed to keep your files reachable from every email client and to avoid accidental conflicts with other users.
Why we rename uploaded files
The new name strips spaces, accents and special characters that break links in some email clients, and it guarantees that two users uploading logo.png never overwrite each other. The fresh name also forces inbox providers to reload the latest version, and unpredictable URLs are harder for scrapers to guess.
How the new filename is built
Mailpro generates a short random identifier and keeps the original file extension (.jpg, .pdf, .png…) so the file is still recognised by browsers and email clients. The image still displays exactly as before in your campaign — only the URL changes.
Where to manage your files
You can review and reuse uploaded assets from the file library in your Mailpro account. For details on supported sizes and formats, see file sizes and extensions and images and files hosting.
Use the renamed URL as is
Always copy the link Mailpro returns after upload — do not edit the random part. Need a refresher? Read our guide on hosting images and files.