Question
How are different envelop attributes treated by SendGrid when sending an email?
Product
Twilio SendGrid (Email)
Answer
The MAIL FROM envelope attribute also known as Return-Path. By default, SendGrid override the Return-Path so we can handle Bounces and Spam reports. This attribute different from the From: email address, which is the one that will appear as email sender.
The ENVELOPE TO attribute, also known as RCPT To is the actual email that will be used to reach the recipient. Please note, however, that the email that will be displayed as recipient is the one in the To: field. In cases like this, the inconsistency between the RCPT To and the To email address might lead to emails being classified as Junk/Spam.
Additional Information
- To learn more about Mail From and Envelope to headers, you can refer to RFC5321.