You might have better luck asking the question on SAP SQL Anywhere Forum
FWIW I can ping that domain, but V12 xp_startsmtp gives error code 100 socket error for both the domain and the IP. The V16 xp_startsmtp give error code 5 connect error and secondary code 10060 timeout for both the domain and IP. In no case does it get far enough to give a password error... probability is high that none of that is going to help you :]