SMPT fails to authenticate as per the log below. What could the problem be
DllDate: Jan 19 2012
Architecture: Little Endian; 32-bit
Language: .NET 4.0
250-PIPELINING 250-8BITMIME 250-SIZE 15000000 250 STARTTLS
EHLO TC6 250-.co.za Hi pc-00024..co.za [192.168.0.24] 250-PIPELINING 250-8BITMIME 250-SIZE 15000000 250 STARTTLS AUTH LOGIN 500 Unrecognized command
asked Feb 07 '14 at 05:12
It appears that your SMTP server doesn't support the basic LOGIN method (nor does it report what methods it supports).
Try changing the SmtpAuthMethod property to "NONE", "PLAIN", "CRAM-MD5", or "NTLM" to see which one ultimately works. If you need NTLM authentication, then you may also need to set the SmtpLoginDomain property.
answered Feb 10 '14 at 20:52