Universal Containers (UC) has a policy that requires all email traffic to remain within itsfirewall.

For Universal Containers, which requires all email traffic to remain within its firewall and handles a high volume of cases with attachments, Email-to-Case is the recommended solution. Email-to-Case allows emails to be converted into cases within Salesforce while keeping email data secure within the company ' s firewall, accommodating the need for security and efficiency in handling customer cases.

Email-to-Case is the Salesforce standard for handling high-volume email processing securely. It allows for secure transmission via TLS encryption , and it can efficiently process large volumes (such as 2,000+ cases/day) including multiple attachments .

Salesforce Email-to-Case offers the scalability, encryption, and attachment handling required for compliance with secure email policies. It also allows for configuration of attachment size limits and filtering.

A custom email service might offer flexibility but would be costlier to maintain and implement, and Einstein Activity Capture is intended for syncing email/calendar data, not for case creation or secure intake of customer email attachments.