mail 550

"550 5.7.1 unable to relay for XXX" error in lumisoft Mail Server This error occurs when I explore lumisoft Mail ServerSource codeIn the process, it severely plagued me for a week. Fortunately, I am still very resilient to find the cause and

1,Java Development, registered users when using the mailbox activation "550 users do not have permission to log on" errorcause Analysis: The default 126 mailbox or 163 Mailbox does not turn on client authorization authentication and requires manual

Use CDO. Message object to send mail. It is forbidden. The content of the failed email reminds me of the time when he was taken The legendary email block center ]. Guerrillas? Regular Army? Which one is easy to recognize?   You have to make

From: Author: (2001-11-2307: 08: 00) 1. the goal of the Simple Mail Transfer Protocol (SMTP) is to deliver mail reliably and efficiently. it is independent of the transfer subsystem and requires only one channel that can ensure the order of

From: Author: (2001-11-2307: 08: 00) 1. the goal of the Simple Mail Transfer Protocol (SMTP) is to deliver mail reliably and efficiently. it is independent of the transfer subsystem and requires only one channel that can ensure the order of

Original issue background:A few days ago, ops colleagues suddenly found that Zabbix monitoring no longer send mail, and Zabbix monitoring interface status can be displayed. Because there have been similar problems, estimated to be 163 mailbox

Recently there are users who reflect the occasional 550 sent out of the Internet mail, the content for delayed sending of the 4.4.7 QUEUE. Expired; Message expired.Environment for Exchange 2007, mail is routed to a branch hub server---headquarters

 Table (1) SMTP CodeCode definition421 service not available, hosts in the closing transmission channel brackets cannot provide normal services, close the transmission pipeline, and emails will be stuck on the host450 requested mail action not taken:

3. 7. the domain was recently introduced to the ARPAInternet email system. The domain can be used to change the address space from a flat string host name to a global address level. A host is replaced by a domain name. The starting host is composed

When it comes to sending mail, first mention SMTP (hehe, the master will skip this section!). )。 The full name of SMTP is "Simple Mail Transfer Protocol", which is simply the message Transfer Protocol. It is a set of specifications for transferring