Deliverability Test — Inbox Type Comparison

Compare reply rates, bounce rates, and positive reply rates broken down by inbox type (SMTP, Gmail / G Suite, Outlook / Office365) across your Smartlead account. Use it to answer "are my Gmail inboxes performing better than my SMTP ones?" or "why is one inbox type bouncing more than the others?"

Why this exists

Different inbox types have different deliverability characteristics:

• Gmail / G Suite — highest trust, fewest bounces, often best reply rates
• Office365 — good reputation, but stricter spam filtering
• SMTP (Zapmail, Maildoso, Mailforge, custom) — varies wildly by provider, often has higher bounces in the first 30 days of domain life

If your campaigns mix inbox types, this skill shows which type is earning its keep.

What you need

• SMARTLEAD_API_KEY in env
• Optional: --client-id=<id> for sub-clients
• Optional: --days=<N> lookback (default 7)