+++++++++++++++++++++++++++ R:userx@test.ex -44 13121 SMTP error from remote mail server after RCPT TO:<userx@test.ex>: host 127.0.0.1 [127.0.0.1]: 451 Recipient not OK first failed = time last try = time2 next try = time2 + 1 ******** SERVER ******** Listening on port 1224 ... Connection request from [127.0.0.1] 220 ESMTP EHLO myhost.text.ex 250-OK 250 HELP MAIL FROM:<CALLER@test.ex> 250 Sender OK RCPT TO:<userx@test.ex> 451 Recipient not OK QUIT 250 OK End of script