MailSlurp guides for messaging, testing, reliability, and extract workflows

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6 of 23 resources

March 3rd, 2026

What Is an Email Alias? How Alias Addresses, Forwarding, and Masking Work

Learn what an email alias is, how alias addresses forward mail without exposing the destination inbox, and when teams should use aliases for support, testing, and workflow automation.

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March 3rd, 2026

Email Verification Guide: How to Verify Email Addresses Before You Send

Learn how email verification works, how to verify email addresses with layered checks, and how to reduce bounce risk before signup, import, and pre-send workflows.

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March 3rd, 2026

Custom email domain setup with MailSlurp (step-by-step)

Configure a custom email domain with MailSlurp using TXT, MX, and DKIM records. Practical verification workflow and rollout checklist.

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June 6th, 2023

Send emails in Laravel using Mailable or Notification (test with Dusk)

Configure Laravel PHP projects with MailSlurp mailservers to send and receive email in code and tests.

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Introduction to MailSlurp

Install and configure MailSlurp using SDK libraries or REST API. Create phone numbers and email accounts and control them in code and tests.

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Creating inboxes

How to create inboxes with custom domains or pre-assigned email addresses.

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12 of 12 resources

ResourceWE

March 3rd, 2026

Why Emails Go To Spam: A Practical Guide To Spam Filters, Diagnosis, and Fixes

Learn why emails go to spam, which signals matter most, and how to diagnose authentication, routing, reputation, content, and list-quality issues before they turn into delivery incidents.

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ResourceSM

March 3rd, 2026

SMTP Mail Protocol Guide: How Simple Mail Transfer Protocol Works

Learn how SMTP works as the mail transport protocol for submission and relay, how it differs from IMAP and POP3, and how to test SMTP workflows safely.

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ResourceP2

March 3rd, 2026

Port 25: What It Is, Why It Gets Blocked, and What To Use Instead

Learn what port 25 is for, why cloud providers often restrict it, how it differs from ports 587 and 465, and when SMTP relay on port 25 is still appropriate.

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ResourceGW

March 3rd, 2026

Google Workspace MX Records: Setup, Verification, and Common Mistakes

Learn which Google Workspace MX records to publish, how to verify Gmail routing after DNS changes, and which migration mistakes break inbound mail.

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ResourceES

March 3rd, 2026

Email Size Limits: Attachment Caps, Gmail Limits, and Practical Sending Rules

Learn how email size limits really work, why attachments grow during encoding, what Gmail size limits mean in practice, and how to test large-email workflows safely.

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March 3rd, 2026

Spam Filter Guide: How Email Spam Filters Work and What They Flag

Learn how spam filters evaluate email, which signals trigger filtering, and how teams can test auth, content, and sender reputation before they send.

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March 3rd, 2026

SPF Verification Guide: How to Check and Validate SPF Records

Learn how SPF verification works, how to check an SPF record correctly, and how to interpret pass, fail, softfail, and neutral results.

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March 3rd, 2026

Outlook SMTP Settings Guide: Server, Port, TLS, and Common Errors

Learn the typical Outlook SMTP settings, how Outlook.com differs from Microsoft 365, and how to troubleshoot auth and relay failures safely.

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March 3rd, 2026

Office 365 SMTP Settings Guide: Server, Port, TLS, and Troubleshooting

Learn the standard Office 365 SMTP settings, ports, TLS requirements, and common authentication problems so you can test and troubleshoot safely.

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ResourceMR

March 3rd, 2026

MX Records Guide: What Mail Exchanger Records Do and How to Check Them

Learn what MX records are, how mail exchanger priority works, and how to check MX setup when domains are not receiving mail as expected.

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ResourceIV

March 3rd, 2026

IMAP vs POP3: Differences, Sync Behavior, and Which Protocol to Use

Compare IMAP vs POP3, understand where SMTP fits, and choose the right protocol for synced inboxes, offline access, and test environments.

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ResourceIS

March 3rd, 2026

IMAP Server Guide: Hosts, Ports, Security, and Troubleshooting

Learn what an IMAP server does, how hostnames and ports are configured, and how to troubleshoot common IMAP access and sync failures.

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