Hello! I understand you're having trouble sending attached photographs through Blue Mail, and it's indicating an incorrect format. Let's see if we can resolve this together.

1. Check the File Format: First, could you please confirm the type of image file you are attempting to send? Blue Mail primarily supports standard formats like JPEG, PNG, and GIF. If the file is in a different format (such as TIFF or RAW), that might be the issue.

2. File Size Limitations: Blue Mail, like most email services, may have attachment size limits. Could you check the size of the image you're trying to send? Files larger than the limit typically lead to errors. Try sending a smaller image and see if that works.

3. Re-authenticate: Sometimes an email account needs to be re-authenticated to work properly. You can do this by updating your password in the Blue Mail app, even if you have not changed it. This can refresh your connection and possibly resolve any underlying issues.

4. Check for Updates: Ensure that you're using the latest version of Blue Mail. Sometimes bugs are fixed in updates, and running an outdated version may lead to issues.

If you've gone through these suggestions and the problem persists, please let me know so we can explore deeper troubleshooting options. Are you satisfied with the solutions I provided, or would you like me to assist you further?

This happened after my computer "updated" during the night as it often does. It will send email without photos but not with.

Thank you for the additional context! It sounds like the issue started after a recent update to your Windows 10 system, which can sometimes cause unexpected behavior in email clients like Blue Mail. Let's dig into this a bit more and find a solution!

1. Restart Your Computer: Sometimes, a simple restart can resolve minor glitches that occur after an update. If you haven't done this yet, please give it a try.

2. Check the File Type: As previously mentioned, please ensure that the images you're trying to attach are in a compatible format (like JPEG, PNG, or GIF). If you have those file types, continue with the next steps.

3. Change Network Connection: If you’re connected through Wi-Fi, try switching to cellular data, if possible, or vice versa. This sometimes helps when sending large attachments1.

4. Clear Cache and Data: Clearing the app cache or data can sometimes resolve issues. Here’s how to do that for Blue Mail:
- Open the Blue Mail app.
- Go to settings within the app (usually found in the menu).
- Locate the option to clear cache or data (this might be listed under ‘Storage’). This might help refresh the app.

5. Reinstall Blue Mail: If the previous steps do not resolve the issue, a reinstall might be necessary. Please uninstall Blue Mail completely and then download the latest version from the official site. This can help if the update caused corrupted files1.

If none of these steps resolve the issue, please let me know, and we can explore contacting the support team or looking further into other settings. Are you satisfied with the solution I provided, or do you need more assistance?