How to set up forwarded mail?

Question

I have several email addresses associated with my personal domain name that I have, that I set up on my host as forwards/aliases so I don't actually check server for mail sent to those accounts.
In Apple Mail I want to be able to send out mail sometimes using these addresses and so I set up accounts for them in Mail/Prefs so they appear in the "From" drop down menu. Mail requires requires you enter "Incoming Mail Server" info for accounts you set up, which I don't know how to handle since there isn't a corresponding account on my webhost and some times Mail asks me for my password for these forwarded addresses, and there isn't one.
How do I set this up?

Answer 1

I assume that you want to be able to use the addresses of these domains as 'From' addresses but use the same outgoing server as you are using with your other mail?
For each domain name, follow this procedure:
Create a new account in Mail Preferences>Accounts, The Description can be anything convenient, the Email Address is that which you want to use, and enter your name. For Incoming Mail Server, Usere Name and Password enter any old garbage (the User Name garbage must be different for each of these accounts you set up).
Set up the Outgoing Mail Server the same as the one you normally use.
Now click on the 'Advanced' tab. Check 'Enable this account' but do not check 'Include when automatically checking for new messages' (or you will keep getting error messages on auto-checking. Note that if you manually 'Get all new mail' you will get error messages for these accounts).
Now the domain addresses will appear as options in the 'From' drop-down menu beneath the Subject field.
In Mail Preferences>Composing set 'Send new messages from' to 'Account of selected mailbox' and you should find that when replying the 'From' address matches the one the message was sent to.