Support for SMTP Rate Limits / Throttling

October 13, 2023

In the latest release pushed today, we're introducing native support for rate limiting/throttling when sending emails using a SMTP server.

What is rate limiting?

Some SMTP service providers (like Microsoft 365 and AWS) enforce a limit on how fast their services can be called. Since Newsletter Studio wants to send emails as fast as possible this could introduce issues if the rate limits of the SMTP-server are exceeded. In this case, you will see many e-mails with the status "Delivery failed" and probably error messages indicating that the e-mail was not sent due to rate limits.

Configure rate limiting

To use rate limiting, go to the Administration view for your Workspace and scroll down to the SMTP settings where you'll find the option to "Limit sending rate", just check this and configure your desired rate.

What versions of the package?

This feature was introduced in the following versions:

Newsletter Studio v3.0.12 for Umbraco 8
Newsletter Studio v10.0.6 for Umbraco 10
Newsletter Studio v11.0.7 for Umbraco 11
Newsletter Studio v12.0.3 for Umbraco 12

You can always find the latest release for your Umbraco-version on our installation page.

More from the blog

Moving fast, v15 is out now!
December 15, 2024

Today we're happy to announce table releases for both Umbraco 14 and 15. They are all the same features and runs on the new modern Umbraco backoffice.
Read more
Bellissima! Finally a release for the new backoffice
December 10, 2024

After months of hard work we're finally to ship a release for Umbraco 14 and the Umbraco 15 version is just around the corner.

The user interface in this new release has been totally rewritten for the new Umbraco backoffice aka Bellissima.
Read more
Working on support for Umbraco 14+
May 23, 2024

Umbraco 14 comes with a totally new, and rewritten backoffice experience. The whole backoffice has been updated and future proofed using modern web technologies like Web Components.

This of course means that any package extending the backoffice must migrate it's client side code to use the new modern technologies and extensions API.

We have been working on the upgrade for several months and the work continues, in the blog posts we'll outline our progress.
Read more
Newsletter Studio nominated for Umbraco Package Awards 2024
May 17, 2024

With only a couple of weeks until the yearly Umbraco conference Codegarden in Odense, Denmark we're thrilled to announce that Newsletter Studio has been nominated for the Umbraco Package Awards 2024.
Read more
List Unsubscribe headers to comply with Gmail and Yahoo
January 29, 2024

More and more recipients will mark unwanted e-mails as SPAM, lowering the reputation for sending e-mail server and making it harder for spam-filters to detect the real spam. The List-Unsubscribe header was introduced to mitigate this problem and to make it easier for recipients to unsubscribe from unwanted e-mails.

Gmail and Yahoo recently announced that they will demand big e-mail senders to include these headers in marketing emails beginning in February 2024.

In our latest release, we include native support for List-Unsubscribe headers to facilitate better deliverability.
Read more
File based configuration
January 5, 2024

Today we're releasing new versions of the package with fixes and a new feature that enables file based configuration.

This is great news if you want to ensure certain settings based on the environment the site is running on.
Read more
Release for Umbraco 13
December 18, 2023

We're excited to announce the release of Newsletter Studio version 13 targeted to run on the newly released Umbraco 13.

Other than the Umbraco 13-support and .NET 8, there are no major changes or new features added, so upgrading should be very straightforward.
Read more
Running on Linux and Mac
November 2, 2023

Today we are thrilled to introduce official support for running Newsletter Studio on Linux and MacOS.

This is a great improvement that enables hosting Umbraco websites with our package installed on Linux and Linux containers.
Read more
Exporting to CSV and resending transactionals
October 1, 2023

We're excited to announce a new release of Newsletter Studio with fixed issues and some new features. It's now possible to export recipients as CSV from both the recipients overview and from an individual mailing list. We've also added a feature to re-send transactional emails.
Read more
Stable release for Umbraco 12
July 29, 2023

Today we're happy to announce the first stable release of Newsletter Studio for Umbraco 12. This release includes all the goodies from the v11-version and adjustments for Umbraco 12. We're also shipping a patch-release for Umbraco 11 with bug fixes and improvements.

Try it out today!
Read more
Umbraco 12 Release Candidate
May 20, 2023

The official release of Umbraco 12 is due at the end of June 2023, but a release candidate (RC) is already available.

We've also published a release candidate of Newsletter Studio that runs on the upcoming Umbraco 12-version. Try it out today!
Read more
Creating campaigns programmatically
January 23, 2023

Several clients have been asking for a way to create new campaigns programmatically from code. This is something that we used to support in older versions and also something that has been on the roadmap, so we're very happy to announce that this is now supported.
Read more
Official Release for Umbraco 11
December 12, 2022

We are happy to announce the first official release for Umbraco 11 with several updates to the package and changes to use Razor Class Libraries for our client side files.
Read more
Updated Release Candidate for Umbraco 11 (RC2)
November 27, 2022

We've updated our RC for Umbraco 11 to use a Razor Class Library for static files and also updated the Umbraco-dependency to v11-RC5.

The RC is in a stable state and we plan to release our first stable version for Umbraco 11 very soon after the official release.
Read more
Patch releases and RC for Umbraco 11
October 30, 2022

Today we've released an RC (release candidate) with support for Umbraco 11.

We've added support for deep links into apps and programs from e-emails and solved some bugs.
Read more
Stable release for Umbraco 10 + patches for 8 & 9
October 13, 2022

We've released a stable version for Umbraco 10 and .NET 6 with full support for SQLite.

At the same time, we're shipping patch-releases for Umbraco 8 & 9.
Read more
Beta for Umbraco 10 and new versioning
July 17, 2022

Today we're releasing the first beta for Umbraco 10 and .NET 6. We're also announcing that our versioning scheme will change to better align with Umbracos release cycles.
Read more
Announcing Newsletter Studio for Umbraco 9
November 7, 2021

As we've announced before the new iteration of Newsletter Studio will run on both Umbraco 8 and Umbraco 9. We're in the process of migrating parts of the package to .NET 5 and we've come a long way.

We have an RC (Release Candidate) out that has the same features and core-API as the Umbraco 8-version.
Read more
Newsletter Studio 3 is out!
March 7, 2021

Finally, after a lot of hard work - the Newsletter Studio 3 for Umbraco 8 is out! The new version is a total rewrite for Umbraco 8, we have tried to be smart about this so that we can make the move to Umbraco vNext (based on .NET 5).
Read more