can not send ot email 503 Valid RCPT command must precede DATA

  • Thread starter Thread starter Tony357
  • Start date Start date
It means that the mail server didn't see who the e-mail should go to before
receiving that data (body) of the e-mail. Many mail servers do sanity
checks to prevent spam and this could be interferring with whatever you are
using to send e-mail.
 
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