Category: Email Deliverability

Practical guides to domain authentication, sender reputation, routing, and reliable email delivery.

Mailjet Alternatives: APIs, Inbound and Migration

Compare Mailjet alternatives by sending, campaigns and mailbox needs. Check API behaviour, access, costs and migration evidence before moving traffic.

Sendmux Team16 hours ago14m

An envelope and stacked record blocks illustrate sending requirements and retained mailbox state when comparing Mailjet alternatives.

SparkPost Alternatives: Compare APIs, Inbound and Plans

Compare thirteen SparkPost alternatives by sending, inbound email and mailbox state. Check current plans, access boundaries and a controlled migration.

Sendmux Team1 day ago12m

Compare email providers against sending, receiving and persistent state requirements.

Support Agent Mailbox APIs: Context, Scope and Tests

Choose a support agent mailbox by its access scope, conversation history and recovery behaviour. Test API fields, events, sending permissions and handoff.

Sendmux Team3 days ago12m

A support mailbox preserves email history as context for agent work.

Agent Self Registration: APIs, Tokens and Tests

Build agent self registration around durable inbox access, separate owner-approved sending, scoped credentials and tests for recovery, events and revocation.

Sendmux Team3 days ago12m

Tenant Email Isolation: Seven Migration Steps

Migrate to tenant email isolation with seven checks for identity, DNS, suppression, routing and recovery. Verify access boundaries without promising isolated reputation.

Sendmux Team3 days ago11m

Tenant email boundaries: verify access authorisation separately from sending reputation.

Outbound Email Infrastructure: Build and Verify Each Layer

Build and verify outbound email infrastructure across authentication, identity, reputation, retries and feedback. Check provider limits and classify failures before acting.

Sendmux Team5 days ago15m

Outbound email checklist: prepare, send and check every layer.

Owner Approval Workflow: Save the Right Credentials

Use the Sendmux owner approval workflow with durable read credentials, explicit Sending approval and safe retries. Keep token roles and invitation state separate.

Sendmux Team6 days ago9m

Owner review and consent precede granting an agent sending access.

Multi-Tenant Email: Suppression and Isolation Checks

Build multi-tenant email around correct tenant attribution, scoped access and suppression. Check domain, provider and reputation boundaries before scaling.

Sendmux Team7 days ago15m

Multi-tenant email separates tenant identity and data from sending policy and limits.

SMTP vs Email API: Five Checks Before You Migrate

Compare SMTP vs email API through five developer checks: compatibility, connection behaviour, credentials, delivery feedback and migration recovery.

Sendmux Team8 days ago11m

SMTP and email API submission paths, with the reminder that acceptance is not delivery.

Email Retry Strategy: Five Steps to Safer Sends

Build an email retry strategy around failure classification, stable send identities, provider pacing and message expiry. Test uncertain acceptance before increasing attempts.

Sendmux Team9 days ago13m