not all inboxes are created equal.

if you bought cheap inboxes from a random reseller, you might be sharing the same sending IP as a bunch of spammers. gmail may have already flagged your IP before you even send your first email.

inbox setup checklist

• [ ] your inboxes are client-owned (not shared or rented)
• [ ] you know what sending IPs your inboxes are on
• [ ] your IPs haven't been blacklisted (check at mxtoolbox.com/blacklists)
• [ ] each inbox sends a maximum of 10-15 emails per day
• [ ] you're not sending all volume through a single inbox

provider diversification

going all-in on one provider is a liability. when that provider updates its filtering models, your entire operation collapses overnight.

the two-lane provider strategy:

→ split your sending between Google Workspace and Microsoft Outlook

→ 70/30 or 50/50 configurations both work

→ if one provider tightens filtering, the other lane keeps running

→ monitor each lane separately so you catch problems early

score yourself:

• [ ] sending through Google only → HIGH RISK
• [ ] sending through Outlook only → HIGH RISK
• [ ] sending through both with a planned split → GOOD