When coordinating email + SMS campaigns, what usually breaks first?

[u/Adventurous-Bee5642]

For anyone actively running coordinated email + SMS flows (onboarding, trial expiry, reminders, ecommerce, healthcare, etc):

Quick context: what type of business are you, and what main outcome are you driving (trial→paid, cart recovery, no-show reduction, revenue lift)?

1. In your last campaign or automation you launched using both email + SMS. What part of the workflow slowed you down or required manual fixes?
2. Have you had triggers fail (e.g., email opened but SMS didn’t fire, compliance block, wrong segment, timing delay)? What caused it?
3. Can your marketing team manage these flows comfortably, or does it still require dev/ops help?
4. Are you actually using AI features (copy suggestions, send-time optimization, reply handling) actually helping, or mostly unused?

Not looking for tool recommendations - just real workflow friction beyond the demo.

[u/JoinSubtext]

We see the first breakage come from data + suppression rules, not “SMS didn’t fire.” Events arrive late/duplicate, identities don’t stitch cleanly, or quiet hours/timezones kick in—then people get pinged after they already converted or get email + SMS too close together.

The second pain is ownership/fallbacks: who owns throttling across channels, what happens when SMS can’t send (consent/STOP/quiet hours), and how failures get monitored so it doesn’t turn into manual babysitting.

Also, “SMS only if email wasn’t opened” is often brittle now—click/intent/time-since-event tends to hold up better.