> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://krystal-dev.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# What is the maximum email attachment size?

We generally operate a 50MB limit for email message size. Many ISPs block messages that are larger than 20MB, so a 50MB limit is quite substantial.

Please note that this 50MB limit is for the complete email message, including attachments.

If you wish to send and receive very large files then you should consider using a service like [https://wetransfer.com/ (external link opens in a new window)](https://wetransfer.com/) or a cloud-based filing sharing service like DropBox or OneDrive.

Email was never intended or designed to be a large file transfer protocol.

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