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