ApexIntermediateemail-servicesinboundparsing
Design Apex email services for inbound email-to-case parsing
Real World Scenario
Vendor invoices emailed to unique address must create Case with attachment and parsed PO number.
Expected Answer
• Inbound Email Handler implements Messaging.InboundEmailHandler
• Parse subject/body with regex; validate before Case create
• Store attachments via ContentVersion linking to Case
• Handle malformed emails gracefully without throwing unhandled
• Idempotency via Message-ID header preventing duplicate cases
• Bulk test with Messaging.InboundEmail mock
• Spam filtering rules before auto-case creation
Follow-Up Questions & Answers
Click to expand — each follow-up includes a direct, interview-ready answer
Stay within limits by: Inbound Email Handler implements Messaging.InboundEmailHandler. Bulkify everything — never query or DML in loops. Store attachments via ContentVersion linking to Case. Inbound email is untrusted input—validate and sandbox attachment handling. Balance speed of delivery with maintainability.
Architect Perspective
Inbound email is untrusted input—validate and sandbox attachment handling.