MailSlurp developer blog

March 19th, 2026

What Does POP3 Mean? POP3 Protocol Explained in Plain English

Learn what POP3 stands for, how the POP3 protocol works, which ports it uses, and when POP3 still makes sense versus IMAP.

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March 19th, 2026

What Does IMAP Mean? IMAP Protocol Explained in Plain English

Learn what IMAP stands for, how the IMAP protocol works, which ports it uses, and when IMAP is the right mailbox model versus POP3.

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March 19th, 2026

Inbox Placement Testing Explained: How Seed Tests Show Inbox vs Spam

Learn how inbox placement testing works, what seed tests show, and what to compare when evaluating deliverability tools.

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March 17th, 2026

No-reply email address: when teams use one, when it backfires, and better reply flows

Learn when a no-reply email address creates friction, when it can still be acceptable, and how to design reply-friendly email workflows that users actually trust.

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March 15th, 2026

WordPress SMTP Configuration: Plugins, Settings, and Safe Testing

Configure WordPress SMTP for contact forms, WooCommerce, password resets, and notifications with the right plugin settings, sender auth, and staging workflow.

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March 15th, 2026

Test Email Account for QA, CI, and Integration Testing

Learn how to use a test email account for signup, reset, and notification testing with real inboxes, isolated runs, and deterministic assertions.

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March 15th, 2026

Symfony Mailer Setup: SMTP, Templates, and Safe Email Testing

Learn how to configure Symfony Mailer with SMTP, send templated emails, test delivery safely in development and QA, and avoid common production failure modes.

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March 15th, 2026

Strapi Email Configuration and SMTP Setup for Safe Transactional Testing

Configure Strapi email with SMTP or a provider bridge, send password reset and notification emails reliably, and test the full workflow before production.

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March 15th, 2026

Spring Boot Email Integration: JavaMailSender Setup, SMTP Config, and Testing

Learn how to configure Spring Boot email delivery with JavaMailSender, externalized SMTP settings, HTML messages, and inbox-level testing before release.

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March 15th, 2026

SPF Checker: How to Validate SPF Records and Fix Common Failures

Learn how to use an SPF checker to validate SPF records, inspect include chains, fix multiple-record problems, and troubleshoot sender authorization failures.

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March 15th, 2026