Email is important part of amember. Sendgrid is a pretty stable provider and amember already integrated sendgrip nicely. However i would love a deeper integration such as being able to set "unsubscribe = 1" for all emails that are bounced, blocks or invalid over X of times. not sure how sendgrid api works, but this will clean up email db, without having to force user to verify their email. Just a suggestion
Thank you for suggestion! BTW: best way to submit new suggestion is our bugtraker: http://bt.amember.com/
We have sendgrid-webhooks plugin that listen webhooks from sendgrid and unsubscribe users based on it. Do you mind to contact us in helpdesk? https://www.amember.com/support We will send plugin to you. Best Regards.