The Problem: You receive mail from multiple sources in one account. For example, you may receive mail for me@example.com, accounting@example.com and personal@mydomain.net, all in one account. Your “real” account is me@example.com.
When you create a new e-mail, you want it to appear to come from one of the three addresses, but it always says it comes from me@example.com, even if this is an accounting issue. The solution is to create multiple identities.
In RoundCube, let’s add an accounting@example.com identity.
If you want to add another identity for personal@mydomain.net, simply click the plus sign to add a new identity. You can edit these at any time, and you can have as many identities as you want.
Now, when you create a new e-mail in RoundCube, the from address will be a dropdown which you can use to select which identity you want to use (it will default to whichever one you have set as default).
If you receive an e-mail addressed to accounting@example.com and hit the reply button, the identity accounting@example.com will automatically be chosen.
Note:The Filter function (Settings | Account | Mail Filter) can work off the To field. If you have multiple identities, you can tell the mail server to automatically put your personal mail in a “Personal” folder, your Accounting mail in an Accounting folder, and your regular mail in your Inbox. But, be warned; this is done by the mail server itself, so you must tell mail clients other than RoundCube to check for new messages in those folders in addition to the Inbox, or you may not get a visual indicator when you have a new message.
Note: Most mail programs have the ability to create multiple identities, and they all use similar layouts. Thunderbird, Outlook, Mac Mail and Android’s K-9 all have the ability to do the same thing you just did in RoundCube. However, each one must be set up separately; it is not a function of the mail server, but a function of the mail reader.