# Simplex

## Introduction

With Zivver, you can securely send messages from Simplex. Easily and securely send appointment reminders, referrals, and invoices directly from Simplex. You can choose whether to send a message as a regular message or as a secure message.

Info

To send secure email from Simplex, you need a business Zivver account in combination with the _Zivver Mail Submission_ add-on. Mail Submission requires an [Ultimate subscription](/content/nl/prijzen/index.html) and a contract that includes Mail Submission. To activate Mail Submission, contact [sales@zivver.com](mailto:sales@zivver.com).

## Getting started

To send secure email from Simplex, you need a business Zivver account. The steps below allow you to check whether your account is a business account and which organization you are a member of. Repeat these steps for each email address you use in Simplex.

1. Open a web browser and go to [https://app.zivver.com](https://app.zivver.com/).
2. Log in with your email address and password.
3. Go to [Personal Settings](https://app.zivver.com/settings/profile) _settings_.
4. Click _account_circle_ **Profile** in the top-left corner.
5. At the top of your profile, you will see the name of the organization you are a member of:

_Your account is part of [name of your organization]_  
6. Your account is suitable for sending secure email from Simplex.

Note

If you do not see the text _Your account is part of [name of your organization]_, but you do have a business account, ask the administrator of your organization to invite you.

[Learn how to invite a user to your organization as an administrator](https://docs.zivver.com/en/admin/webapp/references/inviting-colleagues-with-sso.html)

## Setting up Mail Submission in Zivver

To enable secure email in Simplex, you use the Zivver Mail Submission functionality. You must be an administrator to configure this.

1. Go to [SMTP credentials](https://app.zivver.com/admin/smtp-credentials).
2. Click  New SMTP credentials.
3. Enter a description.

_For example, “Simplex”._  
4. Click Generate.

_A new screen opens showing a username and password. These details are shown only once. Make sure to store them securely._  
5. Click Close.

You have now generated an SMTP username and SMTP password. You will enter these details in Simplex later. Make sure to store them safely.

## Setting up secure email in Simplex

Two configuration options exist for sending secure email from Simplex. Choose one of the options below.

### Send all messages from Simplex securely via Zivver

1. Start Simplex.
2. Go to **Applicatie-instellingen** > **Systeem** > **Email accounts instellen**.
3. Click **Wijzigen**.
4. In the top-right corner, enter the following details:
   - For **SMTP servernaam**, enter `smtp.zivver.com:587`.
   - For **SMTP inlognaam**, enter the username from the previous chapter _Mail submission instellen in Zivver_.
   - For **SMTP wachtwoord**, enter the password from the previous chapter _Mail submission instellen in Zivver_.
   - For **Uw eigen email adres**, enter the sender’s email address.
   - For **Naam afzender op email**, enter the sender’s name.
   - For **Reply email adres**, enter the sender’s email address.
5. _Optional_: enable **Eerst inloggen voor het verzenden (bij twijfel uit laten staan)**.
6. For **Beveiliging (bij afwijkende poortnummers)**, select `indien aanwezig, beveiliging gebruiken (Explicit TLS)`.
7. Click **OK**.

You can now send secure messages from Simplex.

### Choose per message whether it should be sent securely via Zivver

01. Start Simplex.
02. Go to **Applicatie-instellingen** > **Systeem** > **Email accounts instellen**.
03. Click **Toevoegen** _add_.
04. Enter an _Accountnaam_.

_For example, “Zivver”._  
05. Enter an _Omschrijving_.

_For example, “Verstuur veilig”._  
06. Enable **Account is aktief**.
07. Enable **Default account**. You can always manually select a different _Email account_ to send a regular email.
08. Enter the _POP3 servernaam_ of your email provider.

_This does not relate to your Zivver account._  
09. Enter the _POP3 inlognaam_ of your email account.
10. Enter the _POP3 wachtwoord_.
11. _Optional_: enable **Verwijder emails na het ophalen van de POP3 server** if required.
12. In the top-right corner, enter the following details:
    - For **SMTP servernaam**, enter `smtp.zivver.com:587`.
    - For **SMTP inlognaam**, enter the username from the previous chapter _Mail submission instellen in Zivver_.
    - For **SMTP wachtwoord**, enter the password from the previous chapter _Mail submission instellen in Zivver_.
    - For **Uw eigen email adres**, enter the sender’s email address.
    - For **Naam afzender op email**, enter the sender’s name.
    - For **Reply email adres**, enter the sender’s email address.
13. _Optional_: enable **Eerst inloggen voor het verzenden (bij twijfel uit laten staan)**.
14. For **Beveiliging (bij afwijkende poortnummers)**, select `indien aanwezig, beveiliging gebruiken (Explicit TLS)`.
15. Click **OK**.

You can now send secure messages from Simplex.

## Sending a secure message

1. Click **Nieuwe email** > **Voer zelf een email adres in**.
2. Compose a message.
3. Under **Gebruik account**, select an email account that sends messages via Zivver.
4. Send the message as you normally would.

The recipient will now receive the message securely via Zivver.

Updated on 2026-06-18