Google Postmaster

Given that Gmail accounts for 80% of all email traffic, you can utilize Google Postmaster Tools (GPT) to examine your email performance and track deliverability concerns.

The Postmaster Dashboard is quite significant; here's what you can find on it:


Domain Reputation:

A higher IP reputation means that emails sent from this IP are more likely to reach the inbox of the intended recipient rather than the spam folder. If you send a large volume of emails and users designate them as spam, your IP reputation will decline.

You should verify your sending list on a regular basis to reduce unfavorable user feedback. Make sure you're only sending emails to people who show an interest in receiving them.

About Reputation:

Mail detected as spam by Gmail's Spam filter, as well as mail reported as spam by users, are included in the definitions of spam below.

  • Bad: A track record of sending a lot of spam. This entity's mail will almost always be rejected or designated as spam at connection time.
  • Low: This sender is known to send a large volume of spam on a regular basis, and mail from this sender is likely to be classed as spam.
  • Medium/Fair: Known for sending decent mail, but has also sent a small amount of spam on occasion. Unless there is a significant increase in spam levels, most of the email sent by this company will be delivered.
  • High: Has a track record of sending relatively little spam and follows Gmail's sender guidelines. The spam filter will only label a small percentage of emails as spam.

Tip: Keep in mind that spam filtering relies on thousands of signals, one of which is IP reputation.

Delivery Errors:
In comparison to all authenticated traffic, this graph shows what proportion of your total emails were rejected or momentarily failed. A list of reasons why an email failed can be found beneath the graph.

About Delivery Errors:

  • Rate limit exceeded: Temporary rate limitations have been implemented because the domain or IP is delivering traffic at an unusually high rate.
  • Suspected spam: Our systems suspect that the traffic is spam.It's possible that the email content is spammy: Because of the content, the traffic is suspected of being spammy.
  • Bad or unsupported attachment: Gmail does not support attachments in traffic.
  • Sending IP has a low reputation: The sender IP's reputation is really poor.
  • DMARC policy of the sending domain: A DMARC rejection policy has been set up for the sender domain.
  • Sending Domain has a low reputation: The sender domain's reputation is really low.
  • IP is in one or more public RBLs: The IP is listed in one or more public Real-time Blackhole Lists (RBLs). Work with the RBL to get your IP de-listed.
  • Domain is in one or more public RBLs: The Domain is listed in one or more public Real-time Blackhole Lists. Work with the RBL to get your domain delisted.
  • Bad or missing PTR record: The sending IP is missing a PTR record.
  • Feedback Loop: If you're a large sender, the FeedBack Loop (FBL) can help you figure out which campaigns in your traffic are generating a lot of complaints from Gmail users. The FBL is especially beneficial for ESPs in detecting service misuse.
  • Authentication: Over all received traffic that tried authentication, this dashboard provides the percentage of your emails that passed SPF, DKIM, and DMARC.

About SPF, DKIM, & DMARC graphs:

  • SPF graph: Shows percentage of mail that passed SPF vs all mail from that domain that attempted SPF. This excludes any spoofed mail.
  • DKIM graph: Shows percentage of mail that passed DKIM vs all mail from that domain that attempted DKIM.
  • DMARC graph: Shows percentage of mail that passed DMARC alignment vs all mail received from the domain that passed either SPF or DKIM.
  • Encryption: This dashboard shows what percentage of your inbound and outbound traffic is encrypted.

About TLS inbound & outbound graphs (Transport Security Layer):

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

Note: Please contact our customer service team to activate this. It is exclusively available to our enterprise customers.