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Deliverability research, engineering deep-dives and field-tested cold outreach playbooks.
DeliverabilityApril 22, 2026·12 min read
The 2026 cold email deliverability playbook
A 12-step checklist of every authentication record, content hygiene rule and warmup pattern you need before your first campaign.
By Maya Reyes
EngineeringApril 12, 2026·8 min read
Why MailFlow runs on SMTP + IMAP, not the Gmail API
Restricted Google scopes carry a $500-$2,500 yearly tax and a hard 100-user cap. Here's why we picked the protocol path instead.
By Aydın Güneş
DeliverabilityMarch 28, 2026·10 min read
DMARC, explained without the jargon
Quarantine vs reject. Strict vs relaxed alignment. RUA vs RUF. A working operator's guide to getting DMARC right the first time.
By Selin Demir
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