help... please ane one can explain :
when i send message from squirre email, horde, and roundcube always notice this :

Message not sent. Server replied:

Requested action not taken: mailbox unavailable
550 Verification failed for <ketikorg@ketik.org>
No Such User Here
Sender verify failed


how to solve this problem.. help...:eek:

Try disabling "sender verify" from WHM

If the above doesn't work, the problem is most likely because it's set to :fail: at the receiving mail server. Basically the email account "ketikorg" is not available at "ketik.org".

Are you sure you have the correct e-mail address?

yes,, thats default my email adrreass from hosting provider.

how to "sender verify"
i dont find thats menu?

how to "sender verify"
i dont find thats menu?
You'll most likely need to ask your hosting provider but chances are they won't change this setting.

If you check the default address section in cPanel, is it set to :fail: No such user here? You would have to create "ketikorg" e-mail address in cPanel if you haven't already.

Do you have access to WHM or just have a cPanel access to the server ?

maybe you right,,
every i check default address in section cpanel always show Current Setting: :fail: No Such User Here

thanks alot,,, i will ask my hosting provider

yes i have access WHM...

I tried to validate your mail address. I got the following errors.
=============
Validating ketikorg@ketik.org...
Validation results
confidence rating: 0 - Bad address
error : RecipientRejected - Mail server rejected the email address.
canonical address: <ketikorg@ketik.org>
=============

It seems your mail address is having some error.