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) and strict authentication; Outlook/Microsoft leans heavily on domain/IP reputation and SmartScreen filtering and is less forgiving of new senders. Both Gmail and Yahoo (and increasingly Outlook) require SPF + DKIM + DMARC + one-click unsubscribe from bulk senders. Warm separately for each — a domain doing well at Gmail can still struggle 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 watch placement per provider. Autocloz warms + monitors per mailbox and keeps auth + unsubscribe compliant for both ecosystems.
> Start free — land in Gmail and Outlook with warmup + auth handled.