How do I create a new sender?
Create sender
New senders can be created via Settings → From addresses. 
 
Configuration of a reply-to address
 Sender name: Real name/shown name, freely selectable; this name appears in the inbox of the addressee. Good examples are your company’s name + info, newsletter, and mail.
 
 Mail address (Local Part): The local part of a from address refers to the value preceding the at character (@). You should only use alphanumerics, dots, underscores, and hyphens.
 
 Domain: Sender domain. Here you can select any of the domains that are set up in the client. 
 
 
Configuration of a reply-to address
 Reply-To address: Mail recipients that want to answer you will send their reply to this e-mail address. This should be an address of your company.
 
 Reply-To Name: Real name of the reply-to address. Enter the real name of the reply-to address, e.g., the name of your company. 
 
The reply-to addresses can be used for every one of your senders. At this point it is possible to enter a separate address for each sender, also for senders that differ in their real name.
You have the possibility to work with several sender addresses. Add further domains here: Settings → Domains.
 
Miscellaneous settings
Delete sender
It is not possible to delete a sender. This security measure is built into the system because the sender addresses might be in use in drafts, auto campaigns, and copies of dispatched campaigns.
To prevent mix-ups, you can rename the senders you no longer require, distinguishing them by means of memorable names. 
 
Watch a tutorial on how to create a from address: