Topic

Deliverability

Practical guidance on reaching the inbox: sender reputation, bounce and complaint handling, blocklists, throttling, and what mailbox providers actually reward.

22 articles

  1. 8 min readEmail Authentication

    SPF Flattening or Macros: Which One Should You Be Using?

    SPF’s 10-lookup limit can trigger failures for domains using many email providers. Flattening replaces includes with IP lists but can grow large or stale, while macros use one dynamic DNS lookup and scale better. The right choice depends on address-set size, complexity and upkeep.

    Areeb Majeed
    SPF Flattening or Macros: Which One Should You Be Using?
  2. 14 min readDeliverability

    Suppression Handling: The Often-Overlooked Layer of Reliable Email Infrastructure

    Suppression handling helps email systems learn from delivery failures and stop sending to invalid or problematic recipients. Centralising this control reduces repeated bounces, wasted processing and log noise while supporting cleaner sending practices, sender reputation and safer infrastructure.

    Patrick Yammouni
    Suppression Handling: The Often-Overlooked Layer of Reliable Email Infrastructure
  3. 4 min readEmail API & Integrations

    Maileroo Now Integrates With SMTP & Email Logs for WooCommerce

    That’s why we’re excited to announce our new integration with SMTP & Email Logs for WooCommerce, allowing WooCommerce store owners to send transactional emails reliably through Maileroo while gaining complete visibility into their email activity.

    Patrick Yammouni
    Maileroo Now Integrates With SMTP & Email Logs for WooCommerce
  4. 6 min readDeliverability

    Post SMTP Review: Is This The Best SMTP Plugin for WordPress?

    Is this really the best SMTP plugin for WordPress, or are there better ones?

    Jody Gail Arsolon
    Post SMTP Review: Is This The Best SMTP Plugin for WordPress?
  5. 15 min readDeliverability

    The Top 51 Email Providers Our Customers Send To

    We analyzed millions of emails sent through Maileroo and discovered something more complex: your messages are reaching 50 different email ecosystems, each with its own rules, users, and quirks.

    Jody Gail Arsolon
    The Top 51 Email Providers Our Customers Send To
  6. 7 min readDeliverability

    The Complete Guide to Email Warm-Up for New Domains

    This guide will walk you through everything you need to know about warming up your new domain for email success.

    Jody Gail Arsolon
    The Complete Guide to Email Warm-Up for New Domains
  7. 12 min readDeliverability

    Unsubscribe Best Practices: Making It Easy (And Why You Should)

    Here's something that makes you think twice: making it ridiculously easy for people to unsubscribe from your emails is actually one of the smartest business moves you can make.

    Jody Gail Arsolon
    Unsubscribe Best Practices: Making It Easy (And Why You Should)
  8. 3 min readDeliverability

    My Experience With Yahoo's TSS04 Error

    Recently, I started receiving a temporary deferral from Yahoo indicating that emails were being delayed due to unexpected volume or user complaints. This IP had been in use for around six months, and we hadn't encountered these error codes before.

    Areeb Majeed
    My Experience With Yahoo's TSS04 Error
  9. 8 min readDeliverability

    Email Marketing Success Stories: 7 Real Businesses That Transformed Their Results

    Email might seem old-school in our age of social media and instant messaging, but it remains one of the most powerful tools for business growth. The problem? Many businesses struggle with emails that never reach their customers, get buried in spam folders, or simply don't generate results.

    Jody Gail Arsolon
    Email Marketing Success Stories: 7 Real Businesses That Transformed Their Results
  10. 7 min readDeliverability

    SMTP2GO Review (2025): Pros, Cons, and Best Alternatives

    While SMTP2GO offers these benefits, there are several alternatives available in the market that provide similar services with their own unique features and advantages.

    Jody Gail Arsolon
    SMTP2GO  Review (2025): Pros, Cons, and Best Alternatives
  11. 8 min readDeliverability

    Apple’s Private Relay Email Addresses (@privaterelay.appleid.com): What They Are & How They Work

    Apple has built its reputation on strong privacy and security. They’ve introduced tons of features over the years to keep your personal information safe.

    Jody Gail Arsolon
    Apple’s Private Relay Email Addresses (@privaterelay.appleid.com): What They Are & How They Work
  12. 4 min readEmail Authentication

    How to Set Up Reverse DNS (rDNS) / PTR?

    Reverse DNS (rDNS) is essential for tasks like email authentication, network diagnostics, and compliance. It involves mapping an IP address back to a domain name using PTR records. Proper rDNS setup ensures secure and efficient network operations, aiding in email deliverability and troubleshooting.

    Areeb Majeed
    How to Set Up Reverse DNS (rDNS) / PTR?
Features

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SMTP Relay

Send transactional and bulk emails through reliable SMTP infrastructure built for speed, security, and deliverability.

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Email API

Integrate email delivery into your applications using powerful APIs built for flexibility, scalability, and performance.

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Streams

Separate transactional and marketing traffic into isolated sending streams to protect reputation and keep critical emails fast.

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Inbound Routing

Receive and route incoming emails directly into your applications using flexible automation and processing workflows.

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Email Marketing

Create and deliver marketing campaigns designed to increase engagement, reach, and customer retention.

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Webhooks

Receive real-time event notifications for deliveries, opens, and clicks for storage and automation workflows.

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Analytics

Monitor email performance with detailed insights, reporting tools, and actionable delivery metrics in real time.

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Dedicated IPs

Gain greater sending control with dedicated IPs designed for consistency, reputation, scalability, and reliability.

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Build integrations faster using SDKs, code examples, and resources for modern application development.

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