Email attachments exceeding 10MB

Traditionally the best practice for email servers and gateways have been to set limit on the size on email attachments to 10MB.

With the introduction of modern mobile phone cameras we have identified a number of BMP form submissions have contained a number of large images exceeding this limit. While the form submission is successful any email notifications have failed to send.

Introduced January 2015 we have set up a data pipeline which checks all emails leaving the platform and identifies any which contain attachments over the 10mb limit.

The process is as follows.

• A data pipeline checks all email submissions leaving the platform and identifies any which contain attachments over the 10mb limit.
• Once identified the system will then send an email to the receiver containing a limited secure download link where the user can then download an archived email payload.
• A standard email client can then open and view the email data including all attachments.