am use Atmail
Could not send message to SMTP server. Check you have access to send messages via the server and that all To/CC/BCC addresses are valid\nError: SMTP Server rejected email. Returned:550 "Unknown User"
Squirrelmail
Message not sent. Server replied:
Requested action aborted: error in processing
451 Temporary local problem - please try later
Help Me ple
Could not send message to SMTP server. Check you have access to send messages via the server and that all To/CC/BCC addresses are valid\nError: SMTP Server rejected email. Returned:550 "Unknown User"
Squirrelmail
Message not sent. Server replied:
Requested action aborted: error in processing
451 Temporary local problem - please try later
Help Me ple