Email deliverability for Gmail and Outlook (what each one rewards)
Gmail weighs engagement and authentication heavily; Outlook leans on sender reputation and SmartScreen. Both now require one-click unsubscribe for bulk senders. Here's how to land in each.
Short answer: Gmail rewards recipient engagement — opens, replies, "important" marks — plus strict authentication. Outlook/Microsoft leans hard on domain/IP reputation and SmartScreen filtering, and it's far less forgiving of new senders. Gmail and Yahoo (and increasingly Outlook) all demand SPF + DKIM + DMARC + one-click unsubscribe from bulk senders. Warm each one separately: a domain sailing through Gmail can still stall at Outlook.
Gmail
- Engagement is king — prune non-openers, prioritise repliers.
- Keep complaint rate near zero (Postmaster Tools shows it).
- Authentication + one-click unsubscribe are effectively mandatory.
Outlook / Microsoft
- Reputation-driven; new domains/IPs ramp slower.
- SmartScreen is strict on salesy content + links.
- Warm gently; sudden volume spikes get filtered fast.
Practical takeaway
Segment by recipient provider, warm for both, and track placement provider by provider. Autocloz warms + monitors per mailbox and keeps auth + unsubscribe compliant across both ecosystems.
> Start free — land in Gmail and Outlook with warmup + auth handled.