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Cold Email Deliverability

All posts in cold email deliverability.

Cold Email Deliverability

Domain Reputation: Repair, Rest, or Retire

Use a domain reputation disposition worksheet to choose controlled repair, temporary rest, or retirement from preserved incident evidence.

Sofia Urrego
Sofia Urrego
5 min·Sep 9, 2026
Cold Email Deliverability

Email List Cleaning Tools: Run a Blind Bake-Off

Compare email list cleaning tools with a blind test that measures false decisions, uncertainty, evidence quality, latency, and repeatability.

Christian Sørensen
Christian Sørensen
5 min·Sep 9, 2026
Cold Email Deliverability

Email List Cleaning Service: The Batch Acceptance Test

Evaluate an email list cleaning service with a batch acceptance test for dispositions, catch-alls, suppressions, deletion, and credits.

Sofia Urrego
Sofia Urrego
6 min·Sep 8, 2026
Cold Email Deliverability

How to Read a DMARC Report and Know What to Fix

Read a DMARC report from the outside in, connect source IPs to senders, and turn SPF, DKIM, alignment, and disposition results into action.

Sofia Urrego
Sofia Urrego
8 min·Sep 7, 2026
Cold Email Deliverability

Google Postmaster Tools: Turn Dashboards Into Decisions

Use Google Postmaster Tools to read spam, reputation, authentication, and delivery signals without overreacting to incomplete data.

Jacob Martinez
Jacob Martinez
7 min·Sep 7, 2026
Cold Email Deliverability

Email Bounce Back Codes: What They Mean and What to Do

Decode an email bounce back by rejection code, identify who owns the problem, and choose whether to retry, suppress, or repair the sending setup.

Dimitar Petkov
Dimitar Petkov
9 min·Sep 7, 2026
Cold Email Deliverability

Inbox Placement Test: A Practical Guide for B2B Senders

Learn what an inbox placement test measures, how to run one, and how to turn seed results into safer B2B sending decisions.

Sofia Urrego
Sofia Urrego
5 min·Sep 6, 2026
Cold Email Deliverability

Microsoft 365 Outage: The Outbound Failover Plan You Need

A Microsoft 365 outage can stall Exchange Online mail flow during an active campaign. Build an outbound failover plan before the next incident.

Jacob Martinez
Jacob Martinez
6 min·Sep 5, 2026
Two Providers Now Handle 38.6% of Popular-Domain Mail: The Deliverability Risk Nobody Is Mapping
Cold Email Deliverability

Two Providers Now Handle 38.6% of Popular-Domain Mail: The Deliverability Risk Nobody Is Mapping

Google Workspace and Microsoft 365 now sit behind 38.6 percent of popular-domain mail, up from a self-hosted majority a decade ago. Outbound teams that cannot say which provider receives each prospect's mail are running a single point of failure they have never measured.

Dimitar Petkov
Dimitar Petkov
8 min·Aug 29, 2026

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