I have created 2 eMail accounts and one signature for each.
How can I make sure the right signature is used depending on what account I use to send an eMail?

Example:
There are 2 accounts:
info@xxx
support@xxx

If I click "new mail", the info-accounts seems to be the default "from"-account (even though I never set it that way). The default signature shows up. I now choose the "support@" account as "from"-address - but the signature stays the same. I have to manually use the options to choose the proper signature.

How can I fix that? I just want a super simple behaviour like Thunderbird provides.