I am using SMTP mail server, and bellow are the errors.
Tue Mar 25 09:08:31 2014 [31715][1][FATAL] SugarPHPMailer encountered an error: SMTP Error: The following recipients failed: rimaz.rauf@test-group.com
Tue Mar 25 09:08:48 2014 [31772][1][FATAL] SMTP -> ERROR:Password not accepted from server. Code: 535 Reply: 535 Incorrect authentication data
Tue Mar 25 09:08:48 2014 [31772][1][FATAL] SMTP -> ERROR: RCPT not accepted from server. Code: 550 Reply: 550-Please turn on SMTP Authentication in your mail client. 134957.vps-10.com
550-(expatforlife.com) [91.109.4.222]:59689 is not permitted to relay through
550 this server without authentication.
Tue Mar 25 09:08:48 2014 [31772][1][FATAL] SugarPHPMailer encountered an error: SMTP Error: The following recipients failed: rimaz.rauf@test-group.com