5.1.3 bad recipient address syntax」というエラーがでて、メール送信できない – ブログ運営のためのブログカスタマイズ
With email in outbox: Failed to send some messages. Negative SMTP reply 501 5.1.3 Bad recipient address syntax · Issue #1328 · thundernest/k-9 · GitHub
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SMTP Protocol Error: 501 5.1.7 Bad sender address syntax when sending mail from our printer through Nethserver - Support - NethServer Community
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SMTP Protocol Error: 501 5.1.7 Bad sender address syntax when sending mail from our printer through Nethserver - Support - NethServer Community
Tony's 挨踢日記: 因為某位收件者被伺服器拒絕,伺服器回應: '501 5.1.3 Bad recipient address syntax。
メールの送受信時にエラーが発生する
With no email in outbox: Failed to send some messages. Negative SMTP reply 501 5.1.3 Bad recipient address syntax · Issue #1286 · thundernest/k-9 · GitHub
Email Bounce Codes: The Complete Guide (Definitions, Solutions, and More)