before you scale, know what you're scaling on.
the biggest mistake agencies make is adding more inboxes on top of infrastructure that's already shaky. more volume on a bad foundation just breaks things faster.
run this across EVERY client account. not just the ones with problems.
per-client checklist:
| Check | Client A | Client B | Client C |
|-------|----------|----------|----------|
| DNS records (SPF/DKIM/DMARC) configured | | | |
| Sending from lookalike domains (not primary) | | | |
| Warmup completed (14+ days) | | | |
| Warmup still running alongside campaigns | | | |
| Volume under 15 per inbox per day | | | |
| Provider split (Google + Outlook) | | | |
| IP reputation clean | | | |
| Reply rate tracked per inbox | | | |
fill this in for every active client. any blank or "no" is a risk you're carrying. fix them before you add capacity.
→ client A has been on Google-only for 6 months with no diversification
→ client B's domains were set up 3 days ago and are already sending at full volume
→ client C's inboxes all share the same IP block and one of them got blacklisted last month