503 valid rcpt command must precede

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/23 15:38:55

Pop before SMTP -- Run a check for new messages (F9 key in Outlook) before sending your message and restart and rerun your spam filter application.Your IP address is entered in a relayhosts file,allow...
再问：老兄，能用中文不
再答：你试试使用非加密模式，SMTP端口改成25或26

(in reply to RCPT TO command). 550 the rcpt account is invalid (in reply to RCPT TO command 550 unknown user (in reply to RCPT TO command). You must enter a valid PIN You must enter a valid birthdate. the locate command must be issued before the continue comman you must enter a valid e-mail address什么意思 You must enter a valid address.这个是什么中文意思? You must enter a valid e-mail address 是什么意思 Time must be a valid time of day A compentent speaker of a language must have a command of th 英语翻译Candidates,over25,male.He must has a good command of bot