What Salesforce platform capability should an Integration Architect consider when migrating to Salesforce from a legacy system with SMTP-based integrations?

When migrating to Salesforce from a legacy system that utilizes SMTP-based integrations, the most relevant capability for the Integration Architect to consider is a Custom InboundEmailHandler to process the messages. This option allows for a structured way to receive and handle email messages within Salesforce, making it effective for integrating with SMTP systems.

Salesforce’s InboundEmailHandler is specifically designed to process inbound emails sent to Salesforce. It allows the architect to define custom logic to handle the content of the email, which is crucial when migrating functionalities that expect to receive email messages from a legacy system. This approach naturally aligns with the SMTP protocol, as it directly manages and interprets incoming emails.

The other options, while they may have some connection to messaging or integrations, do not directly address the need for handling incoming emails in a manner that a legacy SMTP system would require. For example, utilizing a Custom Apex class to implement the SMTP protocol would be redundant because Salesforce does not support sending emails using the SMTP protocol but rather through its own messaging framework. Similarly, using a Custom Apex batch job would not be the ideal method for continuously processing incoming emails, as it would introduce unnecessary complexity and potentially miss real-time processing opportunities.

In summary, leveraging a Custom InboundEmailHandler aligns with the