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via Google Groups by Kamal Ahmed, 1 year ago
via Google Groups by aougruti, 1 year ago
501 Syntactically invalid HELO argument (s)
via csdn.net by Unknown author, 2 years ago
via Coderanch by Carol Enderlin, 1 year ago
501 5.0.0 HELO requires domain address
via Stack Overflow by user3026263
, 1 year ago
501 5.5.4 Invalid argument Done Testing Complete , Check Inbox Please
via Coderanch by Ketan KC Chachad, 1 year ago
501 5.0.0 Invalid domain name
javax.mail.MessagingException: 501 Syntactically invalid HELO argument(s)
>	at com.sun.mail.smtp.SMTPTransport.issueCommand(SMTPTransport.java:1363)	at com.sun.mail.smtp.SMTPTransport.helo(SMTPTransport.java:838)	at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:375)	at javax.mail.Service.connect(Service.java:275)