Setting Up Google Postmaster

What is Google Postmaster Tools?

TL;DR

  • Google Postmaster Tools is a free dashboard that shows you how Gmail sees your sending domain. Reputation, spam rate, and authentication status
  • If your candidate emails or job alerts are going to Gmail spam, this is the first place to look
  • A domain reputation of High or Medium is your benchmark; Low or Bad means deliverability problems that need fixing
  • Spam rate above 0.1% is worth investigating; above 0.3% and Gmail will start suppressing your mail across the board
  • Setting it up takes under 10 minutes but the hard part is knowing what to do with the data

Why recruiters actually need this

If you’re sending candidate outreach, job alerts, or marketing campaigns from your agency domain, you are building a sender reputation with Gmail whether you know it or not. Gmail holds around 30–40% of the inboxes your emails are hitting. When your reputation drops (because of high complaint rates, poor list hygiene, or authentication gaps) Gmail starts filtering your mail. Not bouncing it. Filtering it.

The recruiter experience usually looks like this: open rates drop, responses dry up, and candidates stop engaging. No error messages. No warnings. Just silence.

Google Postmaster Tools is how you find out what Gmail actually thinks of your domain. It’s free, it’s authoritative, and most recruiters have never looked at it.

If you want the background on what the tool is and why it exists, read What Is Google Postmaster Tools? first. If you’re ready to set it up and understand what the data means, keep reading.

Step 1: Log in to Google Postmaster Tools

  1. Go to the Google Postmaster Tools website.
  2. Sign in with a Google Account or a Google Workspace account.
    • If your company uses Google Workspace, it’s best to use an account associated with the email-sending domain you want to monitor.

Step 2: Add Your Domain

  1. On the Postmaster Tools dashboard, click the “+” (plus) icon to add a new domain.
  2. Enter the domain you use for sending emails.
    • Example: If your email address is newsletter@mybusiness.com, you’ll add mybusiness.com as the domain.
  3. Click Next to proceed.

Step 3: Verify Domain Ownership

Google requires proof that you own the domain you’re adding. This step involves adding a TXT record to your domain’s DNS settings.

How to Verify Your Domain:

  1. Get Your TXT Record
    • After entering your domain, Google will display a unique TXT record (a long string of characters). Copy this record.
  2. Log in to Your Domain Registrar
    • Access the domain management console where your DNS records are hosted. This could be GoDaddy, Namecheap, Cloudflare, or your web hosting provider.
  3. Add the TXT Record
    • Navigate to your DNS settings (look for options like “DNS Management” or “DNS Zone Editor”).
    • Add a new record:
      • Type: TXT
      • Name/Host: Enter @ or leave it blank (depending on your registrar’s setup).
      • Value: Paste the TXT record provided by Google.
      • TTL: Use the default value or set it to 3600 seconds (1 hour).
  4. Save the Changes
  5. Verify in Postmaster Tools
    • Return to Google Postmaster Tools and click Verify.
    • Verification is usually instant but can take up to 10 minutes, depending on DNS propagation.

Step 4: Grant Access to Others (Optional)

If you’re working with a team or an email service provider (ESP), you can grant access to additional users.

  1. In the Postmaster Tools dashboard, click the Manage Domains page.
  2. Locate the domain and click More (three vertical dots).
  3. Select Manage > Add User.
  4. Enter the email address of the person you want to grant access to.
    • Note: The person must have a Google or Workspace account.
  5. Click Save.

Step 5: Explore Postmaster Tools Features

Now that your domain is verified, you can dive into the Postmaster Tools dashboard. Here’s a quick overview of what’s available:

  1. Spam Rate
    • Check the percentage of emails that Gmail users mark as spam. Aim to keep this below 0.3%.
  2. Domain and IP Reputation
    • Monitor how Gmail ranks your sending domain and IPs (High, Medium, Low, or Bad).
  3. Authentication
    • Ensure SPF, DKIM, and DMARC are properly configured. These protocols verify the authenticity of your emails.
  4. Delivery Errors
    • Identify issues like soft bounces or failed deliveries.
  5. Encryption Status
    • Confirm whether your emails are encrypted with TLS during transmission.

Domain Reputation

This is the most important metric in Postmaster. Gmail assigns your domain one of four ratings:

RatingWhat it meansWhat happens to your mail
HighGmail trusts your domainDelivered normally
MediumSome issues notedMinor filtering possible
LowSignificant trust issuesA meaningful percentage of mail goes to spam
BadDomain flaggedMost mail is rejected or spam-filtered

What “good” looks like: High, consistently. For a recruitment agency sending regular outreach and job alerts, you want to hold High. If you’re seeing Medium, investigate before it slides further.

What to do if reputation drops: A drop from High to Medium or Low is a signal, not a sentence. Common causes in recruitment include:

  • Sending to old, unvalidated candidate lists (high bounce rates and disengagement)
  • ATS-generated emails being flagged because the sending domain isn’t properly authenticated
  • A spike in spam complaints following a bulk campaign
  • Sending from a domain with no DMARC policy (see below)

If reputation drops below Medium, don’t just wait for it to recover. Audit your recent send behaviour and authentication setup.

Spam Rate

This shows the percentage of your emails that Gmail users mark as spam. It’s calculated from users who report email via the Gmail interface, so it reflects how recipients actually feel about your mail.

Benchmarks:

  • Below 0.10% — healthy. Keep it here.
  • 0.10–0.30% — Google’s warning zone. You’ll start to see increased filtering.
  • Above 0.30% — Google’s enforcement threshold. At this level, Gmail may suppress delivery across the board.

Realistically, I mostly see recruiters averaging 1-2% user-reported spam but as long as your click and reply rates are good, you should be ok. Where it gets messy is if we see entries in the Delivery Errors dashboard but more on that later.

What to do when spam rate spikes:

A sudden spike usually has a traceable cause. Work backwards:

  1. Check what you sent. Did you run a bulk campaign to an old list? Did the ATS send a large batch of automated notifications?
  2. Check list quality. Candidates who haven’t opened your emails in 12+ months are far more likely to hit spam than engage. Remove or suppress them.
  3. Check content. Subject lines or body copy that read as promotional (heavy on urgency, links, or personalisation tokens that misfired) can trigger complaints.
  4. Check authentication. If SPF, DKIM, or DMARC aren’t properly configured, Gmail can’t verify the mail is legitimate and recipients are more likely to report it.

Don’t wait for the next spike before addressing spam rate. Log in and check it fortnightly, especially before and after any bulk send.

IP Reputation

Similar to domain reputation, but tracked at the sending IP level. Relevant if you’re using a dedicated IP through your email platform. For most recruitment agencies sending via a shared IP (through their ATS or ESP), this will show no data or aggregate data, which is normal.

If you’re on a dedicated IP, you need to actively warm it. Low IP reputation on a new dedicated IP is expected; Low on an established one is a problem.

Authentication

Postmaster shows whether your emails are passing SPF, DKIM, and DMARC authentication. This is a pass/fail view by volume. So if 5% of your emails are failing DKIM, you’ll see it.

What to look for:

  • All three should be passing at or near 100%
  • Any significant failure rate (5%+) means some of your mail streams (often your ATS, your CRM, or a marketing platform) aren’t properly authenticated

The DMARC connection: DMARC sits on top of SPF and DKIM. Without a DMARC record, Gmail has no policy to apply when authentication fails… and your domain is more exposed to spoofing. Postmaster shows authentication pass rates, but DMARC reports give you the granular breakdown of what’s failing and why.

If you’re seeing authentication failures in Postmaster and want to understand exactly which systems are causing them, DMARC reporting is the tool that maps it out. This is a core part of what Quinset configures for recruitment agencies.

For more on how Google’s Postmaster v2 update changed the way this data is reported and what it means for how you monitor your domain now, see Google Postmaster Tools v2: What Changed.

Delivery Errors

This section surfaces failed or deferred delivery attempts to Gmail. A healthy sending programme should show minimal errors. Common causes:

  • Rate limiting: Gmail is throttling mail from your domain (often a reputation or volume issue)
  • Policy rejections: DMARC or spam policy violations
  • DNS errors: Your sending server has configuration problems

For recruiters, delivery errors often appear when an ATS or marketing platform sends at volume without proper warm-up or authentication. If you see a spike here after an outreach campaign or automated job alert batch, investigate the sending source.

Encryption (TLS)

Confirms whether your emails are encrypted in transit using TLS. In 2026, this should be at or near 100%. If it’s not, speak to your IT provider or ESP. This is a basic hygiene issue.

What recruiters should look for in Postmaster

Postmaster gives you raw data. Here’s how to translate it into business outcomes:

Your open rates have dropped unexpectedly Check Domain Reputation first. A slide from High to Medium can correspond directly with increased spam filtering. Recipients never see the email, let alone open it. If reputation has dropped, the open rate decline isn’t a subject line problem. It’s a deliverability problem.

Responses to candidate outreach have dried up If spam rate has risen above 0.1% and you’ve recently run a bulk campaign to an older list, those two things are connected. Clean the list, suppress unengaged contacts, and monitor whether spam rate recovers over the next 2–4 weeks.

ATS notifications aren’t being received by clients or candidates Your ATS (Bullhorn, Vincere, JobAdder, or otherwise) sends email from your domain (or a subdomain of it). If those emails are failing authentication, Postmaster will show it in the Authentication tab. This is one of the more common issues Quinset sees in recruitment agencies: the ATS is misconfigured for SPF/DKIM, and no one notices until it affects placement-critical communications.

You’re about to run a large campaign Check Postmaster before you send. If reputation is Medium or spam rate is already elevated, sending a large batch will make both worse. Get the baseline healthy first.

You’ve just onboarded a new platform Every new tool that sends email from your domain (a new ATS, a marketing tool, a job board integration) needs to be authenticated before it sends. After onboarding, check Postmaster’s Authentication tab to confirm the new send stream is passing.

How to keep your domain healthy

Once it’s set up, Postmaster is a monitor, not a fixer. Here’s what actually moves the needle:

  • Authenticate everything that sends from your domain. SPF, DKIM, and DMARC for every platform. Your ATS, your CRM, your marketing tool, your transactional email provider. All of them.
  • Clean your lists before bulk sends. High bounce rates and low engagement are reputation killers. Use a list validation tool before sending to any list older than 6 months.
  • Don’t send to people who haven’t engaged in 12+ months. This is the single biggest driver of spam complaints in recruitment outreach.
  • Monitor fortnightly, not quarterly. Postmaster data disappears after a rolling window. You can’t retroactively diagnose a problem from three months ago.
  • Act on Medium reputation before it becomes Low. Recovery from Low or Bad reputation is slow and painful. Prevention costs nothing.

FAQ

How long does it take for Postmaster data to appear after setting up? Usually 2–7 days, depending on your send volume. Postmaster needs enough data to display metrics. If you’ve just started sending from a domain, or your volume is low, some sections may show “Insufficient Data” for several weeks.

Can I use Postmaster Tools if I send through Bullhorn or another ATS? Yes, as long as your ATS sends from your domain (or a subdomain of it), Postmaster will track it. But you need to make sure your ATS is properly authenticated. Bullhorn, for example, requires a specific SPF include and a CNAME-based DKIM record. These aren’t the same as your standard email setup and need to be configured separately.

What’s the difference between Domain Reputation and IP Reputation? Domain reputation tracks the trustworthiness of your sending domain. IP reputation tracks the trustworthiness of the server IP your mail leaves from. For most agencies on shared sending infrastructure, IP reputation is less actionable. Domain reputation is the one to watch.

My spam rate spiked but I didn’t change anything. What happened? Check whether any automated send (an ATS notification batch, a job alert digest, or a marketing automation sequence) triggered at volume. Automated sends are often the culprit when spam spikes appear unexpectedly. Also check if any large list was contacted that hadn’t been cleaned recently.

Is Google Postmaster Tools the same as Google Search Console? No. Google Search Console is for website SEO. Postmaster Tools is specifically for email deliverability and domain reputation. They’re both free Google products, but completely separate.

How does this connect to DMARC? Postmaster shows you whether your authentication is passing or failing. DMARC reports show you which sending sources are failing and why. For most recruitment agencies, you need both: Postmaster as an ongoing health check, and a DMARC reporting tool (like Quinset’s Powermail) to diagnose problems at the source.

Ready to act on what you find?

Most recruiters who set up Postmaster find something they didn’t expect. A reputation that’s slipped, an authentication failure from their ATS, or a spam rate that’s been quietly climbing for months.

If you’re not sure what the data means or how to fix what you find, that’s exactly what a Quinset consultation covers. We work specifically with recruitment agencies, so we already know the platforms you’re using and the issues they cause.

Book a free 30-minute call →

No commitment. No sales pitch. Just a straight answer on what’s going on with your domain.

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