We know gmx.com supports to create up to 10 alias for 1 account. At the web-base client, when we reply or compose email, we are able to switch the alias.

So I wonder if I can do so in POP3,IMAP client like thunderbird.

I don't want to add all aliases to my clients because when there has new email the client will receive duplicates.

1 Answer 1


It works perfectly via IMAP with thunderbird.

When composing/replying click the dropdown menu of the email address (From field), pick "Customize From Address...", confirm with OK, and type any of your aliases. It will be accepted.

  • Welcome to Web Applications. From How to Answer "Brevity is acceptable, but fuller explanations are better", i.e. you might add links to the related help artciles from gmx.com about how to set up clients like Thunderbird. Commented Feb 26, 2023 at 19:04

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