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Email guides and resources

Practical guides for sending, deliverability, authentication, inbound email, privacy aliases, DMARC reporting, and migrations.

Featured resources

Start with the guides that cover the most common setup, deliverability, migration, and inbound decisions.

Featured guideDomain Setup Guide for Sending and Receiving EmailConfigure DNS records for Postscale sending, inbound routing, bounce handling, SPF, DKIM, and DMARC.Read guideFeatured guideSPF, DKIM, and DMARC Setup GuideA practical setup for SPF, DKIM, and DMARC alignment when sending transactional email through Postscale.Read guideFeatured guideEmail Deliverability Guide for Transactional MailImprove inbox placement for transactional email with authentication, reputation management, bounce handling, and content discipline.Read guideFeatured guideInbound Email Webhooks GuideReceive email as structured webhooks with parsed headers, bodies, attachments, routing rules, and retry handling.Read guideFeatured guideEmail API Migration GuideMove transactional sending, SMTP relay, inbound webhooks, suppressions, and DNS records from another provider to Postscale.Read guide

Getting Started

Set up Postscale, verify domains, and make the first production send.

StartDomain Setup Guide for Sending and Receiving EmailConfigure DNS records for Postscale sending, inbound routing, bounce handling, SPF, DKIM, and DMARC.Read guide

Sending & SMTP

Send transactional email through the REST API or SMTP relay.

SendSending Transactional Email with PostscaleSend application email through the Postscale REST API with idempotency, templates, metadata, and delivery webhooks.Read guideSendSMTP Relay GuideConnect existing applications and frameworks to Postscale through SMTP while preserving authentication, webhooks, and bounce tracking.Read guide

Deliverability

Improve inbox placement with reputation, bounce, and warming practices.

DeliverabilityEmail Deliverability Guide for Transactional MailImprove inbox placement for transactional email with authentication, reputation management, bounce handling, and content discipline.Read guideDeliverabilityIP and Domain Warming GuidePlan a gradual sending ramp for new domains, subdomains, and dedicated IPs without damaging sender reputation.Read guide

Authentication

Configure SPF, DKIM, DMARC, Return-Path, and DNS records correctly.

AuthSPF, DKIM, and DMARC Setup GuideA practical setup for SPF, DKIM, and DMARC alignment when sending transactional email through Postscale.Read guide

Inbound & Webhooks

Receive, parse, route, and store incoming email through webhooks.

InboundInbound Email Webhooks GuideReceive email as structured webhooks with parsed headers, bodies, attachments, routing rules, and retry handling.Read guide

Privacy & Shield

Use masked addresses and reply routing to protect user identities.

PrivacyMasked Email Addresses GuideUse Postscale Shield aliases to protect user privacy while preserving reply flows and operational control.Read guide

DMARC & Reporting

Parse aggregate reports and monitor authentication alignment.

DMARCDMARC Reports GuideUnderstand DMARC aggregate reports, alignment results, source discovery, and policy rollout using Postscale.Read guide

Migration

Move from SendGrid, Mailgun, Postmark, Resend, or SES with less risk.

MigrationEmail API Migration GuideMove transactional sending, SMTP relay, inbound webhooks, suppressions, and DNS records from another provider to Postscale.Read guideMigrationSuppression List Migration GuideImport bounces, complaints, unsubscribes, and manual blocks from SendGrid, Mailgun, Postmark, Resend, Amazon SES, or a custom CSV before switching email providers.Read guide

Troubleshooting

Diagnose bounces, headers, DNS issues, and webhook delivery problems.

FixDelayed Bounces and Return-Path GuideUnderstand SMTP acceptance, delayed DSNs, Return-Path domains, and how Postscale turns bounce mail into webhook events.Read guide