Current Sendgrid node doesn’t have asm (advanced suppression manager) among additional fields listed for dynamic template.
This field is used by Sendgrid to correctly set unsubscribe link in email, without it link looks something like this:
x-webdoc://02725D1E-9E30-4346…/%3C%25asm_group_unsubscribe_raw_url%25%3E
In JSON it look like this: “asm”:{“group_id”: 12345, “groups_to_display”: [12345]}.
here is more information regarding it.
It’s no way to use n8n SendGrid integration for managing new sellers now - omitting unsubscribe link is illegal.