Email deliverability and signature

Email deliverability and signature

Do you want to know more about art and how to optimize your deliverability? That's good, it's what follows just below!

To start with, what is deliverability? That's how your dear email goes before it arrives safely.

In particular, it must go through several anti-spam filters that check that your address is not blacklisted, analyzes your email content or even verifies that your previous mailings have been successful.

Several factors directly affect deliverability: domain reputation and domain authentication.

The reputation of your domain name

What is a domain name? To put it simply: the domain name is comparable to your postal address on the Internet. This is how your customers will find your website on the web. It is also present in your email address, this is the name that appears in your address after @.

Now let's focus on domain reputation, which is linked to how you're going to send your emails. To dig a little deeper, it is influenced by five factors:

  1. The format of the email : Emails in text format are more likely to land in a main inbox while emails in HTML format are more likely to end up in the “promotion” tab for example.

The HTML format offers you multiple design possibilities. However, the use of heavy or poorly coded tags decreases your reputation.

The text format offers you better deliverability: it's up to you to rely on quality writing to make a difference!

  • Complaints: Your interlocutor decides to report you by placing your email in their “spam”, woe to you!

Let's put things in context: your recipient, the person who is at the center of your campaign, rejects your email. Maximum alert.

Not joking, the degree of confidence in this action is very important since it is a human action, therefore: the higher your complaint rate The less good your reputation is.

  • Bounce rate: The bounce rate represents the proportion of emails that did not reach the recipient, due to an address error...

A high bounce rate means that a large part of your emails did not reach all of your recipients, so it damages your deliverability and your good reputation.

  • Blacklists: Blacklists called blacklists are directories of IP addresses that have been identified as “spammers” by various Internet Service Providers (ISPs).

This means that if your IP address is blacklisted, so is your domain name! This will therefore strongly affect your deliverability...

Any doubt? Verify that your IP address and domain name are not in one of them with This tool !

Result: you are not on the blacklist? congrats

Unfortunately, the test is positive: for your information, each blacklist has its own procedure for requesting to be removed. next step, contact the ISPs and ask them if they agree to remove you from their list of “spammers”.

Domain authentication

Authentication is essential to the smooth delivery of your emails and works like a license plate.

It provides a trackable ID that proves to your recipient's email providers and ISPs (Internet Service Providers) that you are a legitimate sender. It thus makes it possible to control usurped addresses.

In a nutshell: When an email provider performs “domain authentication” they want to check that the email actually came from you and not from someone else.

To set up your authentication, you will need:

  1. SPF (Sender Policy Framework) : An email validation system designed to prevent spam and limit spoofing by verifying your IP address.
  1. DKIM (Domain Keys Identified Mail): An authentication technique that makes it possible to ensure that the domain name has not been usurped. It protects senders and their recipients from spam, forgery, and phishing.

Once set up, you will be able to see a marked improvement in the deliverability of your emails!


The content of the email

The content of your email is also combed through: ISPs (internet access providers) analyze the structure and content of your emails, for example.

Remember, some keywords cause your emails to end up in spam, but that's not the only factor to take into account. External links and the weight of your email also affect your deliverability:

  • External links: Antispam filters check the URLs of your links: if they refer your recipient to a domain name with a bad reputation, you will be penalized...
  • The weight of the email: An email that is too heavy is much more likely to end up in the “spam” box. The weight should ideally be around 500 KB and not exceed 1000 KB. So pay attention to the weight of your images in your emails and the text/image ratio: It is recommended to have a 60%/40% ratio.

Your email signature in all of this?

At Signitic it is possible to control the weight of the images in your signatures! You can specify the format but also the weight and dimensions.

Once the configuration has been saved, on all image import areas, both on the user and administrator parts, your configuration will be imposed.

Card signature mockupSignature card SigniticSignature card SigniticCard signature mockupSignature card SigniticCard signature mockup

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