The first step to determine why Test Mail is not working is to set mail DEBUG on Foglight email settings dashboard. From "Administration | Email | Enable Debug Mode = true" and then generate a FMS support bundle: The following error is found:
2015-11-03 11:16:31.526 VERBOSE [http-exec-91374] STDOUT - DEBUG: getProvider() returning javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Sun Microsystems, Inc]
2015-11-03 11:16:31.526 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: useEhlo true, useAuth false
2015-11-03 11:16:31.526 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: trying to connect to host "testserver.fms.com", port 25, isSSL false
2015-11-03 11:16:31.541 VERBOSE [http-exec-91374] STDOUT - 220 AJCP-EXJRN02.corp.ad.ctc Microsoft ESMTP MAIL Service ready at Tue, 3 Nov 2015 11:16:31 -0500
2015-11-03 11:16:31.541 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: connected to host "testserver.fms.com", port: 25
2015-11-03 11:16:31.541 VERBOSE [http-exec-91374] STDOUT - EHLO P5CPAJ00001FGLC
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - 250-AJCP-EXJRN02.corp.ad.ctc Hello [10.150.20.52]
250-SIZE
250-PIPELINING
250-DSN
250-ENHANCEDSTATUSCODES
250-STARTTLS
250-X-ANONYMOUSTLS
250-AUTH NTLM
250-X-EXPS GSSAPI NTLM
250-8BITMIME
250-BINARYMIME
250-CHUNKING
250-XEXCH50
250-XRDST
250 XSHADOW
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "SIZE", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "PIPELINING", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "DSN", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "ENHANCEDSTATUSCODES", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "STARTTLS", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "X-ANONYMOUSTLS", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "AUTH", arg "NTLM"
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "X-EXPS", arg "GSSAPI NTLM"
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "8BITMIME", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "BINARYMIME", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "CHUNKING", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "XEXCH50", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "XRDST", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: Found extension "XSHADOW", arg ""
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - DEBUG SMTP: use8bit false
2015-11-03 11:16:31.557 VERBOSE [http-exec-91374] STDOUT - MAIL FROM:
2015-11-03 11:16:36.557 VERBOSE [http-exec-91374] STDOUT - 530 5.7.1 Client was not authenticated
2015-11-03 11:16:36.557 VERBOSE [http-exec-91374] STDOUT - com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.1 Client was not authenticated
Confirm with the Mail server administrator the user Name and password, also to make sure that the user has Admin rights to allow the connection from the FMS server to the Mail Server.