UBLink技術團隊討論區

您好,
現發現寄信給某EMAIL Address都會被退信, 可是寄到其他信箱都不會發生...
Sep 17 17:46:48 mail postfix/smtp[13315]: 87EA22FE868E: to=<service@xxxx.com.tw>, relay=mail.xxxx.com.tw[202.168.xxx.xxx]:25, delay=0.17, delays=0.05/0/0.05/0.06, dsn=5.0.0, status=bounced (host mail.reson.com.tw[202.168.xxx.xxx] said: 503 This mail server requires authentication when attempting to send to a non-local e-mail address. Please check your mail client settings or contact your administrator to verify that the domain or address is defined for this server. (in reply to RCPT TO command))

Win7Pro Outlook 2010 with sp2 , 已勾選外寄伺服器需要驗證
Mail Server: UMAAIL version : 3.155

可以查哪裡?

Ks1217

另外主機常會有這些警告

Sep 17 17:56:21 mail postfix/smtpd[17450]: warning: unknown[192.168.1.104]: SASL DIGEST-MD5 authentication failed: authentication failure
Sep 17 17:56:21 mail postfix/smtpd[17450]: warning: SASL authentication failure: realm changed: authentication aborted
是否有問題??

都是驗證失敗
要查Client的設定是否正確
請連絡高雄工程師
遠端搖控電腦試試

Thank You !!

可這些都是偶發性的,只特定寄那個email address會發生退信,寄到其他信箱都沒有問題,
也未改過Client端設定,都是過一兩小時又正常了...

如果不提供完整log查詢
我只能猜
1.對方阻擋
2.DNS Error
3...其他問題