Hi team, we have a large-scale application in use that sends bulk emails to thousands of users. We adhere to all standard guidelines and protocols, and our email addresses are whitelisted to ensure they are not considered spam.
Our users create email alerts on our platform and receive notifications on their respective email addresses. These communications are not unknown, spam, or unsolicited marketing. To maintain trust with our users, we provide an unsubscribe feature as per RFC2369-compliant. We have added list unsubscribe headers with mailTo implementation and sent it to outlook/gmail accounts. However, when unsubscribed, the email seems to be having the encoded characters as is. Whereas the same is working fine in other email clients without any encodings. The headers were implemented according to the List-Unsubscribe headers as specified in the IETF RFC and our emails are purely transactional in nature.
This is a critical issue for a large organization like ours and while it works properly on Gmail web and mobile, it is essential for us to check with Apple Mail client as well. This situation undermines our commitment to user trust and compliance.
Can anybody assist me why the encoding is showing up? Would like to know whats the process involved to enable the unsubscribe button in Apple mail client application?