To extend on stevieb's reply, you probably need to provide credentials (perhaps a username and password) in order to relay from this server. Mail::Sendmail doesn't support this. So if this is indeed the part you're missing, you'll have to pick another email module or write your own that does support SMTP authorization.

In reply to Re: Mail::Sendmail Cannot Send out email by trwww
in thread Mail::Sendmail Cannot Send out email by Gary Yang

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