Files and attachments

In this article, you will learn about the best practices for handling files and attachments.

Erin Jamison avatar
Written by Erin Jamison
Updated over a week ago

There are multiple ways in Karbon to attach a file to an outgoing email. But what are the specific rules and best practices for handling those files? Those are some of the questions this article will answer.


Attaching a file to an email

You can attach files to emails in Karbon just like any other email program. On any email you’re composing you can upload a file by either dragging the file onto the email or by clicking on the paperclip to open your computer's document finder to select the document from your computer.

Downloading attachments from an email

If your email contains attachments, clicking on the file icon will download the attachment or open it in a new browser tab, depending on your browser settings and the file type.

If your email has three or more files attached, you will have the option to download all.

File formats

To protect your account, there are a small number of selected file formats that Karbon does not allow because they pose a security threat. This affects both email attachments and files added to recent documents.

The following file formats are NOT allowed by Karbon:


Karbon also blocks any files that are not allowed by Outlook and Gmail.

File size

The combined total of any files you attach to an email must not exceed 25 MB.

You can, however, attach a file(s) totaling up to 50 MB within a client task.

Resizing images

You can easily resize images uploaded to your account by using our resizing tool.

To resize an image, simply use the insert image icon, upload or drag and drop into the module and resize using the slider tool below.

Limit of number of files on an email

There is no limit to the number of documents you can attach to a single email; however, there is a limit to the size of files.

Open instead of downloading an attachment

By adjusting your settings, you can open attached documents rather than downloading them.

If you click on an email attachment in Karbon, your browser will most likely download it instantly. If you'd like to open the attachment instead, you can adjust your browser settings.

For Chrome users:

Download the file type once, then right after that download looks at the status bar at the bottom of your browser. Click the arrow next to that file and choose "always open files of this type".

Now the file type will always open using your default program.

To reset this feature, go to Chrome's settings / advanced settings. Under the "Download" section, you'll find a button to reset all auto-downloads.

For Internet Explorer users:

Click Start, then Programs (or All Programs) and find Windows Explorer.

Now, click Tools > Folder Options and click on the File Types tab.

When the list appears, find the file extension in the list, click it to highlight it, and then click Advanced. You can now see the Edit File Type dialog box.

The Edit File Type dialog has two options that decide how your Word documents open: Confirm open after download, and Browse in the same window.

For Firefox users:

Click the menu button and choose Preferences.

In the General panel, go to the Applications section.

Select the entry for the file type you want to change.

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