There’s nothing more vexing when you want to log in to Flodesk to jot down all those exciting email newsletter ideas you just came up with—and then you see an error message.

Important: to log in to Flodesk, navigate to https://app.flodesk.com/sign-in and use your Flodesk account login email address.

User not found

If you get an error message saying “user not found,” you’re using an incorrect email address to log in to your account.

Your account email is the email address you use to log in to your Flodesk account.

And it can be different from the email address(es) you use to send your emails from, aka sending email address. This depends on how you have set things up in your account.

What to do?

Double-check that you’re using the correct account login email address and you’ll be set. If you’re unsure, you can reach out to support[at]flodesk.com and ask for assistance.

Additionally, when logging in, use all lowercase letters for your username.

For example, if your email is “MyEmail@MyWebsite.com,” you'll need to enter it as “myemail@mywebsite.com” when logging into Flodesk.


There is an existing account associated with [email address]. Please use another one

You may get this error message, if you try to create a new Flodesk account using an email address that is already set as a sender email address on an existing account.

What to do?

If your intention is to use this specific email address for a new account, you need to remove it first as a sending email address from your existing account.

Otherwise, create an account with a brand new email address that is not used in Flodesk yet.


Email must be a valid email

If you get an error message saying, “Email must be a valid email,” follow the instructions below.

What to do?

  • Make sure there’s no space left after the email address.

  • Clear your browser cache.

  • Check and update your browser to the latest version. If needed, update your operating system as well.

  • If the error message is displayed when you try to log in on a mobile device, use a desktop instead.


Incorrect username or password

You may get this error message, if you try to login using an incorrect password.

What to do?

  • Make sure you're using the correct password associated with that login email address.

  • Click on the Show password option to see if you made a typo when entering the password.

  • If you can't recall your password, click on the Forgot your password? link and follow the provided steps to reset your password.

If you still have difficulties logging in, please email our team at support[at]flodesk.com for assistance.

Let’s sum it up!

When you see a “user not found” error message when logging in, double-check that you’re using the correct account login email address in all lowercase letters.

If the email address is already in use in a Flodesk account as a sending email address, you need to select a different email address when creating a new account.

If you get an “Email must be a valid email” message at login, follow the above listed instructions.

When you see an “Incorrect username or password” error message, double-check that you're using the correct password. And if needed, reset your password.

More to learn:



We'd love to hear about your recent experience when searching for solutions to issues in the Flodesk Help Center (Knowledge Base). With your feedback, we can improve our knowledge base with new and better ways to help you succeed!

Please do not submit support tickets and feature requests via this feedback form.

If you need technical assistance, please submit a support ticket via email at support[at]flodesk.com mentioning your Flodesk account login email with a detailed description of your problem.



Do you have an idea for a feature that will help improve Flodesk for you and other members? Our Product team would love to hear from you.

Submit a feature request here.

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