### [How to Verify Your Domain Reputation for Email Sending](https://wpmailsmtp.com/how-to-verify-your-domain-reputation-for-email-sending/)

**Published:** December 3, 2024
**Author:** Hamza Shahid

**Excerpt:** When it comes to email marketing, keeping a good domain reputation is essential for making sure your messages reach your audience’s inbox.

A positive reputation can improve your open rates and overall engagement, while a low score can lead to emails being filtered out before they even reach your readers.

But how can you check if your domain reputation is on track? In this post, I'll go ahead and explore straightforward ways to verify your domain reputation for email sending and identify what impacts it.

**Content:**

Domain reputation is how email providers measure your trustworthiness as a sender. A good reputation gets your emails into the inbox; a poor one sends them to spam or has them rejected outright. Since November 2025, when Gmail tightened its enforcement of bulk sender rules, domain reputation matters more than ever for inbox placement.

This guide covers how to check your domain reputation using free tools from Google, Microsoft, and third parties, and what factors affect the score.

[Fix Your WordPress Emails Now](https://wpmailsmtp.com/pricing/)

- [What is domain reputation?](#aioseo-what-is-domain-reputation)
- [How do you check your domain reputation?](#tools-to-monitor-your-domain-reputation)
    - [1. WP Mail SMTP](#1-wp-mail-smtp)
    - [2. Google Postmaster Tools](#2-using-google-postmaster-tools)
    - [3. Microsoft SNDS (Smart Network Data Services)](#3-microsoft-snds-smart-network-data-services)
    - [4. Third-party reputation tools](#4-third-party-tools-for-domain-reputation-monitoring)
- [What affects your domain reputation?](#factors-that-affect-your-domain-reputation)
    - [Spam complaints](#spam-complaints)
    - [Bounce rate](#bounce-rate)
    - [Email engagement](#email-engagement)
    - [Sending consistency](#sending-consistency)
    - [Authentication protocols](#authentication-protocols)

## What is domain reputation?

Domain reputation is a score that email providers like Gmail, Microsoft, and Yahoo assign to your sending domain. It’s based on how recipients interact with your emails over time, plus factors like authentication, sending volume, and complaint rates.

A strong domain reputation puts your emails in the inbox. A weak one sends them to spam, and a damaged one can get them rejected at the server before they’re even delivered. For bulk senders, Gmail now requires a spam complaint rate below 0.3%, with 0.1% as the working target for stable deliverability. See our guide to [Gmail’s bulk sender requirements](https://wpmailsmtp.com/gmail-bulk-sender-requirements/) for the full picture.

Domain reputation isn’t published as a single public score. Each major email provider tracks it in their own way, and you’ll need different tools to check what each one thinks of you.

## How do you check your domain reputation?

To get a complete picture of your domain reputation, you’ll need to check several tools. At minimum, set up Google Postmaster Tools (for Gmail) and Microsoft SNDS (for Outlook and Hotmail). Third-party tools like SenderScore and MXToolbox give cross-provider views and check against blacklists.

### 1. [WP Mail SMTP](https://wpmailsmtp.com/ "WP Mail SMTP")

If you’re sending emails from a WordPress site, WP Mail SMTP routes them through a proper email provider rather than the default WordPress mail function. This solves the most common deliverability problem at the source: WordPress emails sent without authentication often fail to reach the inbox at all.

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-1.png)WP Mail SMTP supports a range of email providers, including SendLayer, Brevo, Mailgun, Microsoft 365, Gmail, SendGrid, and others. Each provider has its own deliverability infrastructure, and switching from the default WordPress mail function to a proper email service is one of the most direct ways to improve your domain reputation.

Mailers available in all versionsMailers in [WP Mail SMTP Pro](https://wpmailsmtp.com/pricing/)[SendLayer](https://wpmailsmtp.com/docs/how-to-set-up-the-sendlayer-mailer-in-wp-mail-smtp/)[Amazon SES](https://wpmailsmtp.com/docs/how-to-set-up-the-amazon-ses-mailer-in-wp-mail-smtp/)[SMTP.com](https://wpmailsmtp.com/docs/how-to-set-up-the-smtp-com-mailer-in-wp-mail-smtp/)[Microsoft 365 / Outlook.com](https://wpmailsmtp.com/docs/how-to-set-up-the-outlook-mailer-in-wp-mail-smtp/)[Brevo](https://wpmailsmtp.com/docs/how-to-set-up-the-sendinblue-mailer-in-wp-mail-smtp/)[Zoho Mail](https://wpmailsmtp.com/docs/how-to-set-up-the-zoho-mailer-in-wp-mail-smtp/)[Google Workspace / Gmail](https://wpmailsmtp.com/docs/how-to-set-up-the-gmail-mailer-in-wp-mail-smtp/)[Mailjet](https://wpmailsmtp.com/docs/how-to-set-up-the-mailjet-mailer-in-wp-mail-smtp/ "Mailjet")[Mailgun](https://wpmailsmtp.com/docs/how-to-set-up-the-mailgun-mailer-in-wp-mail-smtp/)[Postmark](https://wpmailsmtp.com/docs/how-to-set-up-the-postmark-mailer-in-wp-mail-smtp/)[SendGrid](https://wpmailsmtp.com/docs/how-to-set-up-the-sendgrid-mailer-in-wp-mail-smtp/)[SMTP2GO](https://wpmailsmtp.com/docs/how-to-set-up-the-smtp2go-mailer-in-wp-mail-smtp/ "SMTP2GO")[SparkPost](https://wpmailsmtp.com/docs/how-to-set-up-the-sparkpost-mailer-in-wp-mail-smtp/)[Elastic Email](https://wpmailsmtp.com/docs/how-to-set-up-the-elastic-email-mailer-in-wp-mail-smtp/)[Other SMTP](https://wpmailsmtp.com/docs/how-to-set-up-the-other-smtp-mailer-in-wp-mail-smtp/)One useful WP Mail SMTP feature for monitoring your domain reputation is the [email log](https://wpmailsmtp.com/docs/how-to-view-email-logs/ "detailed logging capability"). It tracks every email sent from your site, so you can quickly find delivery failures and trace them back to specific emails or recipients.

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-2.png)The [email reports dashboard](https://wpmailsmtp.com/docs/how-to-use-email-reports-in-wp-mail-smtp/ "email reports dashboard") shows key metrics including open rates, click rates, and error frequencies. These don’t directly show your domain reputation but can flag changes in deliverability over time.

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-3.png)If setup feels complicated, the [White Glove Setup](https://wpmailsmtp.com/features/white-glove-setup/ "White Glove Setup") service in the Pro version handles email provider integration, DNS records, and authentication on your behalf.

![WPMailSMTP_Prices](https://wpmailsmtp.com/wp-content/uploads/2024/10/WPMailSMTP_Prices-1024x459.png)[Fix Your WordPress Emails Now](https://wpmailsmtp.com/pricing/)

### 2. [Google Postmaster Tools](https://postmaster.google.com/ "Google Postmaster Tools")

Google Postmaster Tools is the authoritative source for how Gmail views your domain. If you send any meaningful volume of email to Gmail addresses, set it up.

Google retired the original Postmaster Tools in 2025 and replaced it with Postmaster Tools v2, which uses a pass/fail compliance dashboard rather than the older color-coded reputation bars. Once you’ve verified your domain, you’ll see your domain’s compliance status against Gmail’s sender requirements, plus your spam complaint rate and authentication results.

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-4.png)The compliance dashboard shows whether you’re meeting each individual requirement: SPF, DKIM, DMARC alignment, TLS, PTR records, and one-click unsubscribe headers (for bulk senders). For full setup steps, see our [guide to setting up Google Postmaster Tools](https://wpmailsmtp.com/how-to-set-up-google-postmaster-tools/).

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-5.png)### 3. [Microsoft SNDS (Smart Network Data Services)](https://sendersupport.olc.protection.outlook.com/snds/ "Microsoft SNDS (Smart Network Data Services)")

Microsoft SNDS shows how Microsoft views the IP addresses you send from. It’s most useful for senders with their own dedicated sending IPs.

One caveat for WordPress users: most WP Mail SMTP setups send through a shared SMTP service like SendLayer, Brevo, or Mailgun, which means you don’t control the sending IP and can’t register it in SNDS. The tool is most useful if you have a dedicated IP through Microsoft 365, Amazon SES with a dedicated IP, or your own self-hosted mail server.

![](https://wpmailsmtp.com/wp-content/uploads/2024/11/image-6.png)If you do have a dedicated sending IP, register it with SNDS to track delivery status, complaint rates, and any reputation issues specific to Microsoft. Microsoft also publishes a list of IPs and domains it considers problematic, and being on that list damages deliverability to Outlook, Hotmail, and Live.com addresses.

### 4. Third-party reputation tools

Several third-party tools cross-reference reputation data across multiple providers. Each shows a slightly different view, so it’s worth checking more than one if you’re trying to diagnose a problem.

- **[SenderScore](https://senderscore.org/ "SenderScore"):** Assigns a score from 0 to 100 to your sending IP based on engagement, bounce rate, and complaint patterns. A score above 80 generally indicates good deliverability; below 70 suggests problems.
- **[Talos Intelligence (Cisco)](https://talosintelligence.com/ "Talos Intelligence (Cisco)"):** Shows how security filters classify your domain and IP. Useful for understanding why corporate spam filters might be flagging your emails.
- **[MXToolbox](https://mxtoolbox.com/ "MXToolbox"):** Scans your DNS for authentication issues and checks your domain or IP against major blacklists. The free Domain Health check is a quick first diagnostic.

Run these checks monthly, or whenever you notice a drop in deliverability. Catching reputation issues early makes them much easier to fix.

## What affects your domain reputation?

Five factors drive your domain reputation: spam complaints, bounce rate, email engagement, sending consistency, and authentication. Each one is something you can measure, monitor, and improve.

### Spam complaints

Spam complaints have the biggest single impact on domain reputation. When recipients click “Report spam” or “Mark as spam,” that signal goes directly to email providers and damages your sender score.

Gmail enforces a hard ceiling at 0.3% spam complaints. If you cross it, your domain becomes ineligible for Gmail’s delivery support, and you’ll need to stay below 0.3% for seven consecutive days before that’s restored. The working target most stable senders aim for is 0.1% or below. See our guide to [spam rate thresholds](https://wpmailsmtp.com/understanding-spam-rate-thresholds/ "High spam complaints") for more detail.

The most common causes of high complaint rates:

- Sending to people who didn’t actively opt in.
- Making it hard to unsubscribe (no list-unsubscribe header, hidden footer link, or broken unsubscribe flow).
- Sending too frequently or off-schedule.
- Mismatched expectations, where people signed up for one thing and you’re sending another.

![Gmail one click unsubscribe popup](https://wpmailsmtp.com/wp-content/uploads/2024/01/one-click-unsubscribe-gmail-1024x481.png)For more on managing complaints, see our guide on [how to lower your spam complaint rate](https://wpmailsmtp.com/how-to-reduce-your-spam-complaint-rate/ "lower your spam complaint rate").

### Bounce rate

Bounce rate measures the percentage of emails that fail to deliver. Hard bounces (permanent failures, like invalid addresses) hurt your reputation more than soft bounces (temporary failures like full inboxes).

The industry benchmark for a healthy hard bounce rate is below 2%. If you’re routinely seeing higher than that, your list needs cleaning. High [bounce rates](https://wpmailsmtp.com/email-bounces/ "bounce rate") tell email providers you’re not maintaining your list, which lowers your domain’s credibility.

![Example Re-engagement Workflow](https://wpmailsmtp.com/wp-content/uploads/2024/08/example-reengagement-workflow-1-812x1024.png)Re-engagement workflows like the example above automatically remove people who haven’t opened your emails in months, plus invalid email addresses that have hard-bounced. This keeps your sending list healthy and your bounce rate low.

### Email engagement

Engagement metrics are signals that email providers use to gauge whether your audience actually wants your emails. The main ones are open rates, click-through rates, replies, and time spent reading.

Inbox providers don’t have direct access to your CRM data, but they can observe what their own users do when your emails arrive. Do recipients open the email, reply to it, click links, mark it as not spam, or move it to a folder? These engagement signals feed directly into your reputation score.

![email engagement metrics](https://wpmailsmtp.com/wp-content/uploads/2024/10/email-engagement-metrics-1024x454.png)Industry benchmarks vary by sector, but a healthy open rate is generally 20% or higher and a healthy click-through rate is around 2% or higher. Lower than that for an extended period suggests your content isn’t resonating with your audience, which over time pulls your reputation down.

### Sending consistency

Sudden spikes in volume or irregular sending patterns raise flags with email providers. If you usually send weekly and suddenly send daily, your reputation can take a hit even if the content itself is good.

Steady, predictable sending volume builds trust over time. New domains in particular benefit from gradually ramping up sending volume rather than blasting from zero — a process called IP warming.

Each email provider also has its own sending limits. Here are some common ones:

Mailers available in all versionsLimitMailers in [WP Mail SMTP Pro](https://wpmailsmtp.com/pricing/)Limit[SendLayer](https://wpmailsmtp.com/docs/how-to-set-up-the-sendlayer-mailer-in-wp-mail-smtp/)50 – 2,500 per day, depending on plan[Amazon SES](https://wpmailsmtp.com/docs/how-to-set-up-the-amazon-ses-mailer-in-wp-mail-smtp/)Varies[SMTP.com](https://wpmailsmtp.com/docs/how-to-set-up-the-smtp-com-mailer-in-wp-mail-smtp/)Daily limits not published[Microsoft 365 / Outlook.com](https://wpmailsmtp.com/docs/how-to-set-up-the-outlook-mailer-in-wp-mail-smtp/)10,000 daily / 300 daily[Brevo](https://wpmailsmtp.com/docs/how-to-set-up-the-sendinblue-mailer-in-wp-mail-smtp/)300 daily on the free plan. No daily limits for paid plans[Zoho Mail](https://wpmailsmtp.com/docs/how-to-set-up-the-zoho-mailer-in-wp-mail-smtp/)250 daily[Google Workspace / Gmail](https://wpmailsmtp.com/docs/how-to-set-up-the-gmail-mailer-in-wp-mail-smtp/)2,000 daily / 500 daily  [Mailgun](https://wpmailsmtp.com/docs/how-to-set-up-the-mailgun-mailer-in-wp-mail-smtp/)100 per hour  [Postmark](https://wpmailsmtp.com/docs/how-to-set-up-the-postmark-mailer-in-wp-mail-smtp/)Varies by plan  [SendGrid](https://wpmailsmtp.com/docs/how-to-set-up-the-sendgrid-mailer-in-wp-mail-smtp/)100 daily on the free plan  [SparkPost](https://wpmailsmtp.com/docs/how-to-set-up-the-sparkpost-mailer-in-wp-mail-smtp/)100 daily on the free plan  [Other SMTP](https://wpmailsmtp.com/docs/how-to-set-up-the-other-smtp-mailer-in-wp-mail-smtp/)Depends on provider  For a deeper look, see our full guide to [email sending limits](https://wpmailsmtp.com/email-sending-limits-for-wordpress/ "email sending restrictions"). WP Mail SMTP also supports [IP warming workflows](https://wpmailsmtp.com/ip-warming/ "IP warming process") that gradually increase your sending volume, which helps new domains build reputation without triggering volume-based filters.

### Authentication protocols

SPF, DKIM, and DMARC together prove that emails from your domain actually come from you, not from a spammer impersonating you. They’re the foundation of domain reputation in 2026.

Each protocol does something different:

- **SPF** lists the servers authorized to send email on your domain’s behalf.
- **DKIM** adds a cryptographic signature to outgoing emails so receiving servers can verify the message wasn’t altered in transit.
- **DMARC** ties SPF and DKIM together and tells receiving servers what to do if either fails.

All three are required for bulk senders to reach inboxes at Gmail, Microsoft, and Yahoo. Even smaller senders should have all three configured: they’re the single most important thing you can do to protect your domain reputation.

WP Mail SMTP checks your DNS records when you send a test email and flags anything missing or misconfigured.

![cPanel Email Failed Domain Check Results](https://wpmailsmtp.com/wp-content/uploads/2024/09/cPanel-email-failed-domain-check-results-1024x631.png)For setup help, see our guides on [how to create a DMARC record](https://wpmailsmtp.com/how-to-create-dmarc-record/), [fixing multiple SPF records](https://wpmailsmtp.com/fix-multiple-spf-records/), and [the basics of DMARC, SPF, and DKIM](https://wpmailsmtp.com/dmarc-spf-dkim/ "What Are DMARC, SPF, and DKIM?").

### Frequently asked questions about domain reputation

Here are answers to some common questions about checking and improving your domain reputation.

#### How do I check if a domain has bad reputation?

To check if a domain has a poor [sending reputation](https://wpmailsmtp.com/monitoring-your-email-sending-reputation/ "sending reputation"), use tools like Google Postmaster Tools, SenderScore, or Talos Intelligence. Each tool gives you a slightly different view, so checking more than one paints a fuller picture.

#### How do I check domain reputation in Google?

You can check your domain’s reputation with Google using Google Postmaster Tools v2, which Google released in 2025 as a replacement for the original. Once you’ve verified your domain, the dashboard shows your spam complaint rate, compliance status against Gmail’s sender requirements, and engagement metrics from Gmail recipients.

#### How do I get back my domain reputation?

Improving domain reputation comes down to consistent practices: maintaining a clean email list, reducing bounce rates, and ensuring high engagement. Setting up SPF, DKIM, and DMARC correctly removes the biggest single source of reputation damage. Beyond that, sending high-quality content to people who actually want it is what rebuilds trust over time.

#### How often should I monitor my domain’s reputation?

Check your domain’s reputation at least once a month, and more often if you send frequent emails or notice a drop in deliverability. Regular monitoring helps you spot issues early, before they affect your campaigns.

#### How long does it take to repair a damaged domain reputation?

Repair time depends on the severity of the damage. Authentication issues can be fixed in a day or two once DNS propagates. A minor reputation hit from an unusual sending pattern usually resolves in a few weeks. A seriously damaged reputation, with a high spam complaint rate or blacklist entry, can take several months to recover. Consistent improvements are what restore trust over time.

### Next, learn how to reduce email spam complaints

Spam complaints have the biggest single impact on your domain reputation. While you can’t eliminate complaints completely, there are concrete steps you can take to keep them low. See our guide to [reducing email spam complaints](https://wpmailsmtp.com/strategies-to-reduce-email-spam-complaints/ "email spam complaints") for the detail.

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**Categories:** WordPress Tutorials

**Tags:** domain reputation, email reputation, white glove setup, WP Mail SMTP

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