Blog5 articlesUpdated 22 September 2026

The MailFleet blog

Practical, tested writing on cold email: deliverability, warmup, sending volume, sequences and the tooling around them. Every number here is either from how MailFleet actually behaves or linked to its source.

Deliverability · 8 minThe cold email deliverability checklist (2026 edition)A practical, ordered checklist for landing cold email in the inbox — authentication, warmup, volume, list quality, copy, tracking and monitoring — with the provider rules each item comes from.22 September 2026Sequences · 6 minCold email follow-up sequences — how many steps, how far apart, and when to stopA working template for cold email follow-ups — three to four steps over two to three weeks, what each step should say, why the sequence must stop on any reply, how to handle out-of-office and company-wide pauses, and where most sequences go wrong.22 September 2026Sending volume · 5 minHow many cold emails can you send per day? (per mailbox, per domain, per campaign)The real daily limits for cold email — what Google and Microsoft technically allow, what reputation actually tolerates (20–50 per mailbox), and how to scale to thousands a day with more mailboxes, not more volume.22 September 2026Warmup · 5 minHow to warm up a new email domain for cold outreach (a 4-week schedule)A week-by-week plan for taking a brand-new domain and its mailboxes from zero reputation to safe cold sending — DNS first, warmup network, ramped volume, what to watch, and what to do when placement slips.22 September 2026Authentication · 6 minSPF, DKIM and DMARC for cold email — set up and check all three in 20 minutesWhat SPF, DKIM and DMARC each do, the exact DNS records for Google Workspace and Microsoft 365, the alignment rule Gmail enforces, how to check them, and the mistakes that silently fail.22 September 2026

Who writes this

The MailFleet team runs MailFleet and the outreach that runs on it — hundreds of connected mailboxes sending for agencies, founders and sales teams every day. Articles are written from that operating experience and from primary sources (provider documentation, vendors' own pricing pages), which are linked where used. Drafting is assisted by AI; every figure and claim is checked by a person before publishing, and pages carry the date they were last verified.

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