I am looking for an email client that allows me to specify an arbitrary sender adress each time I send a message without explicitly creating a new identity. Especially when I hit reply to, it should use the recipient adress of the original email as sender. I am looking for Linux and Windows GUIs (e.g. Thunderbird) and/or Webmail (e.g. Roundcube). Open-source software is strongly preferred.

I have a domain, example.com where I catch all email. Let's say I buy something from a webshop that requires an email, I use [email protected] to sign up. That way once they start spamming me or leaked my email I can simply block it. Now let's say I want to contact or respond to their customer support via email. Then I would like to also use [email protected] to send a message. Currently with either Thunderbird or Roundcube I have to create a new Identity I am looking for a way to make that more simple.

Clarification: I want to keep the emails on my server. I am not looking for a service but a software that I can run either on my server and/or my computers that connects to the server via IMAP.

  • Hello Zulan and thanks for your question. I have removed the "optional" tags windows/ linux/web-apps (because you don’t require a solution to run on all these platforms) and open-source (because you do prefer but not require a solution to be FLOSS). Feel free to add tags back in case they are requirements.
    – unor
    Commented Jul 31, 2014 at 11:00
  • Hmm... Just to clarify, I meant this service for accessing emails from your personal domain.
    – Neeku
    Commented Jul 31, 2014 at 11:00
  • i'm not sure because I didn't try myself but this Thunderbird feature could help you achieve what you want : support.mozilla.org/en-US/kb/configuring-email-aliases
    – Padrus
    Commented Aug 5, 2014 at 12:57

3 Answers 3


Here are the results of my personal research.


KMail: Very good support

  • Freetext from field
  • Multiple fixed identities can be created with one primary and associated emails
  • When replying to a mail it will select the identity that has the receiver email associated and send from the primary email of that identity
  • Custom sent folder can be set for each identity

Thunderbird: Good support (since this fix)

  • Custom from address can be selected
  • Multiple identities can be created
  • When replying, a custom from address is not used

WEB Interfaces:

Horde poor support

  • Multiple identities can be created
  • Easier if $conf[user][verify_from_addr] disabled (Horde/User Capabilities and Constraints)
  • Custom sent folder needs to be selected per mail

Roundcube poor support

  • Multiple identities can be created
  • Custom sent folder needs to be selected per mail
  • The correct identity is automatically selected in a reply, if the mail has been sent to it and the identity exists

SOGo no support

  • On the Roadmap "Email identities support in the web mail interface"
  • 1
    I added the reply behavior for Roundcube (which is nice) and Thunderbird (poor). I hope this corresponds with your experience?
    – sebix
    Commented Aug 5, 2014 at 18:43
  • @sebix, thanks for your Answer. I can confirm it for Roundcube, but actually selecting the right non-default identity works for me in Thunderbird as well (31.0 on Windows7 64 bit)
    – Zulan
    Commented Aug 5, 2014 at 19:49
  • Thanks for your check, you are right, sry :) hiding behind the last edit
    – sebix
    Commented Aug 7, 2014 at 20:23
  • Finally what do you use now? Did you try to use Horde? It doesn't allow auto-fill sender field from received email during reply?
    – Suncatcher
    Commented Oct 30, 2019 at 23:57
  • I primarily use Thunderbird and it's fine. Don't really do anything with web interfaces these days, haven't really looked into Horde since I wrote the answer.
    – Zulan
    Commented Oct 31, 2019 at 0:29

For completeness and in case you drop your GUI requirement, mutt handles multiple from addresses easily. See i.e. this question or maybe this one.


A current version of Thunderbird with the SmtpSelect and Virtual Identity allows you do exactly what you ask for.

I create new From-addresses in every mail (I have hundreds of them) but only have a couple of accounts and aliases for each account (that I never edit after the initial setup).

I am looking for a similar solution for mobile devices!

  • Since this bug was fixed in Thunderbird it works well even without addons! No Idea about mobile though, sorry.
    – Zulan
    Commented Jun 27, 2018 at 18:44

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.