FYI - I just thought I'd do one more post in case this helps anyone who has the same issues as I did.
If you are integrating Membership Pro with ACY Mailing, you may not get your ACY "welcome messages" to send automatically. This is because Membership Pro registers new users as "not enabled" for a brief period of time when the welcome message should be triggered. Since they user is "not enabled", ACY will not send the welcome message. I'm not sure why it happens this way, but it did for me at least.
To solve this issue, I deleted all of my welcome messages in ACY that we used to send digital products to new customers. Then I created campaigns for for each of my digital products. Each campaign has just one message in it that basically takes the place of the welcome message.
This isn't a perfect solution because the campaigns aren't triggered until the next cron job, so your customers will have to wait 15 minutes to receive their email with their digital download. But, this setup gives Membership Pro time to mark the new user as "enabled" so that ACY will actually send the email.
This caused me to lose a couple days of sales on my site, so I'm hoping this little solution I came up with will help others who have the same problem. Good luck!
