Get started with Postmaster Tools

You can utilise Postmaster Tools to rail data on large volumes of emails sent and find data virtually your sending domain. You can view different dashboards to understand details like Gmail delivery errors, spam reports, feedback loop, and more than.

To use Postmaster Tools, you need to accept a Google Account. If you don't have a Google Business relationship, create 1.

Add your domain to Postmaster Tools

  1. Sign in to Postmaster Tools.
  2. In the lesser correct, click Add Add.
  3. Enter your authentication domain.
    Tip: You tin add either the DKIM (DomainKeys Identified Mail) domain or the SPF (Sender Policy Framework) domain.
  4. Click Next.
  5. Verify your domain:

Manage your data admission

If you own a verified domain, you tin share your Postmaster Tools data with anyone who has a Google Business relationship. You can also add and remove owners from your domain.

Add together someone to your domain

Tip: When you give someone access, they won't get a notification, and so we recommend you let them know. However, they will be able to see the domain when they log in to Postmaster Tools.

Interpret numbers on the dashboard

You tin can apply the data from the different dashboards to understand the best way for you to send your emails.

Spam rate

The spam charge per unit is the per centum of emails marked as spam by users vs emails sent to the inbox for active users. If a substantial number of emails are delivered directly to spam folders, you may meet a low spam rate even though users may still be marking your inboxed emails as spam.

IP reputation

A college IP reputation means emails sent from this IP are more than likely to go to a recipient's inbox instead of their spam folder. For case, if you lot ship a lot of emails, and users mark them as spam, your IP reputation number will go down.

To reduce negative user feedback, you should regularly check your sending list. Be sure to only send emails to users who want your emails.

Virtually reputations

The definitions of spam beneath includes mail service detected as spam past Gmail'south Spam filter, and mail reported past users as Spam.

  • Bad: A history of sending a loftier volume of spam. Mail coming from this entity will almost always be rejected at connexion time or marked equally spam.
  • Low: Known to ship a considerable volume of spam regularly, and mail from this sender will likely be marked as spam.
  • Medium/Fair: Known to send skilful mail, but has occasionally sent a low volume of spam. Most of the email from this entity volition have a off-white deliverability rate, except when there'south a notable increase in spam levels.
  • Loftier: Has a good track record of a very depression spam rate, and complies with Gmail's sender guidelines. Mail will rarely be marked by the spam filter.


Tip: Go along in mind that spam filtering is based on thousands of signals, and IP reputation is merely i of them.

Domain reputation

A higher domain reputation ways emails from your sending domain (SPF and DKIM) are less likely to get filtered to a recipient'southward spam folder or inbox.

Nigh reputations

The definitions of spam below includes mail detected equally spam by Gmail's Spam filter, and postal service reported by users equally Spam.

  • Bad: A history of sending an enormously high book of spam. Mail coming from this entity volition almost e'er be rejected at SMTP or marked as spam.
  • Depression: Known to send a considerable book of spam regularly, and mail service from this sender volition probable be marked as spam.
  • Medium/Fair: Known to send expert mail, merely has occasionally sent a depression volume of spam. Most of the email from this entity will take a off-white deliverability charge per unit, except when there'due south a notable increase in spam levels.
  • High: Has a expert rails record of a very low spam rate, and complies with Gmail's sender guidelines. Post will rarely be marked by the spam filter.


Tip: Keep in listen that spam filtering is based on thousands of signals and domain reputation is merely ane of them.

Feedback loop

This dashboard is available after you set the Gmail Spam Feedback Loop (FBL). To view a table with the identifiers flagged by FBL and their corresponding spam rates, click whatsoever data point on the graph.

Nearly FBL graphs

  • Average FBL spam rate graph: Shows average spam rate across all identifiers flagged by FBL on a given 24-hour interval (when applicable) over time.
  • Identifier volume graph: Shows the number of unique identifiers flagged by FBL per twenty-four hours (when applicable) over time.

Authentication

This dashboard shows the pct of your emails that passed SPF, DKIM, and DMARC over all received traffic that attempted authentication.

About SPF, DKIM & DMARC graphs

  • SPF graph: Shows percent of post that passed SPF vs all mail from that domain that attempted SPF. This excludes any spoofed post.
  • DKIM graph: Shows per centum of post that passed DKIM vs all mail from that domain that attempted DKIM.
  • DMARC graph: Shows percentage of postal service that passed DMARC alignment vs all post received from the domain that passed either of SPF or DKIM.

Encryption

This dashboard shows what percentage of your inbound and outbound traffic is encrypted.

About TLS inbound & outbound graphs

  • TLS Inbound: Shows percentage of incoming mail (to Gmail) that passed TLS vs all post received from that domain.
  • TLS Outbound: Shows percentage of outgoing mail (from Gmail) that was accustomed over TLS vs all postal service sent to that domain.

Delivery errors

This graph monitors what percentage of your full emails were rejected or temporarily failed every bit compared to all authenticated traffic. Nether the graph, you can view a listing of reasons an email failed.

Nigh delivery errors

  • Rate limit exceeded: The Domain or IP is sending traffic at a suspiciously high rate and temporary charge per unit limits have been put in place.
  • Suspected spam: The traffic is suspected to be spam by our systems.
  • Email content is perchance spammy: The traffic is suspected to be spammy specifically because of the content.
  • Bad or unsupported attachment: Traffic contains attachments non supported by Gmail.
  • DMARC policy of the sender domain: The sender domain has ready up a DMARC rejection policy.
  • Sending IP has a depression reputation: The IP reputation of the sending IP is very low.
  • Sending domain has a low reputation: The Domain reputation of the sending domain is very low.
  • IP is in 1 or more public RBLs: The IP is listed in i or more public Real-time Blackhole Lists (RBLs). Piece of work with the RBL to get your IP de-listed.
  • Domain is in i or more public RBLs: The Domain is listed in one or more public Real-fourth dimension Blackhole Lists. Work with the RBL to get your domain delisted.
  • Bad or missing PTR record: The sending IP is missing a PTR tape.

Related articles

  • Postmaster Tools FAQs
  • Feedback Loop (FBL)
  • How encryption works
  • Email authentication

Was this helpful?

How can nosotros improve it?