We currently send emails from iSAMS via SendGrid using SMTP. We would like the ability to support SendGrid unsubscribe groups so recipients can opt out of specific types of emails instead of all communications.
SendGrid requires passing an asm.group_id in the send request. When using SMTP, this is done via the X-SMTPAPI header.
Please consider adding support for:
Custom SMTP headers on outbound email templates (specifically X-SMTPAPI)
OR a more robust integration using SendGrid’s API to allow passing parameters like asm.group_id
This would allow category-based unsubscribe options and improve deliverability (especially with Yahoo/AOL).
Thank you.
