You can't enable a relay on a mailserver by yourself, this has to be done by the admin. Relaying means, that the mailserver accepts your email and lets it pass through to the next. Open relays are the most common reason for spam. You may have to contact the mail server admin.

In reply to Re: How does one override 550 relays for Mail::Sendmail? by le
in thread How does one override 550 relays for Mail::Sendmail? by PipTigger

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