Support for external SMTP server ？？？

[blacksuse]

hi everybody

my english is very poor.i am sorry. pls help..

i have a mailserver with roundcube.  i want user can receive yahoo'mail. and use yahoo's smtp to send email.

How should I do?Which plug can be used?Or edit which configuration file?

Is there any examples available?

thanks very much!

[SKaero]

Last time I checked Yahoo doesn't support IMAP so with out extra server side software RoundCube can't connect to Yahoo email accounts.

[blacksuse]

Skaero,thank you very much.

gmail have this Function....

Send mail as:--------------------------------------------------------------------------------------in gmail Accounts and Import
(Use Gmail to send from your other email addresses)
Check mail from other accounts (using POP3):
Learn more   
Add a POP3 mail account you own   
Add another account


can my roundcube  connect  other smtp to send mail?
How should I do?Which plug can be used?Or edit which configuration file?