Optimizing deliverability of mailings and avoiding spam

Optimizing deliverability of mailings and avoiding spam

Optimizing Deliverability and Avoiding Spam

If you are using one or more custom sender email addresses for your Invitario account, you can significantly optimize the delivery and deliverability of your mailings through some simple technical measures.

We recommend that you extend the DNS settings of your domains with SPF entries as well as DKIM and DomainKeys. If you use a sender email address such as event@company.com, then the DNS settings of the domain unternehmen.com must be extended.

These adjustments allow Invitario to sign outgoing mailings and inform the email providers of your recipients that Invitario is allowed to send mailings via your email address.
These settings can be made by your system administrator within minutes and do not pose a security or privacy risk to your organization. By extending the DNS entries of your domain, Invitario has no access to your domain and cannot receive emails sent to your sending email address or any other email address of your domain.

The Following Measures Can Be Taken in Consultation with Invitario User Support:

Create an SPF Entry: The SPF entry is a list of all servers allowed to send emails from your domain. To do this, simply add the following text entry: "include:spf.mailjet.com"

Set Up DomainKeys/DKIM: This record contains a so-called "Public Key," which your recipients' email providers use to verify that the email actually comes from an authorized sender. The creation of the "Public Key" is individual and is generated by the email service provider (ESP) used by Invitario. You can access the "Public Key" generated for your account by clicking on "Account" > "Administration" > "Sender" > "Your Domain."



Furthermore, You Can Optimize the Deliverability of Mailings within Your Own Organization by Entering the Following IP Addresses:

The Mail Servers of Our Email Service Provider Mailjet Are Located in the Following Two Networks:
– 87.253.233.0/24
– 87.253.234.0/24

To Cover Secondary Mail Servers (Which Are Started if Necessary), the Following IP Ranges Should Also Be Considered:
– 87.253.232.0/24
– 87.253.233.0/24
– 87.253.234.0/24
– 87.253.235.0/24
– 87.253.236.0/24
– 87.253.237.0/24
– 87.253.238.0/24
– 87.253.239.0/24

Be Sure to Take Measures to Keep the "Spam" Rate as Low as Possible, as It Damages Your Reputation as a Sender and Leads to Lower Deliverability of Your Mailings. Spam Complaints Are Often Related to the Following Points:
  • The Sent Email Is Actually Spam Because It Was Never Requested or the Recipient Did Not Consent to Receive It ("Opt-In"): The problem lies in the quality of the contact data, and you should fix this quickly. The spam rate should not exceed 0.1% per mailing. If the values are higher, the system could block your entire mailing to all recipients.

  • The Sent Email Contains No or Only a Hard-to-Find Unsubscribe Link: The recipient will quickly click on the spam button to block these emails in the future. Your unsubscribe link should be easily visible and valid.

  • The Unsubscribe Link Is Present, but the Recipient Immediately Clicks the Spam Button: Have you clearly and cleanly conducted the opt-in process? Was the content of the email relevant to the recipients? Were too many mailings sent too often?
  • From February 2024: Change in authentication requirements for emails at Gmail and Yahoo. To continue to be classified as a trusted sender, please ask your system administrator to make SPF and DKIM entries. You can find the entries that apply to you at the account level under > "Administration" > "Sender" >.

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