Follow the following "Q" representative issues, "a" representative answers.
Q: The Server Says: 550 relaying mail to <> is not allowed
Q: The Server Says: 550 <> ... relaying Denied
Q: The Server Says: 550 5.7.1 relaying not permitted:
A: When using some SMTP servers, limit the recipient's address and can only change one SMTP server.
Q: The Server Says: 550 <>: Local User ONLY
Q: The Server Says: 550 <>: invalid user
Q: The Server Says: 550 Invalid Recipient
A: When using 163.NET, 163.com, Yeah.net, and Netease.com, you can only use your own mailbox to send a letter, so "Personal Information" in Outlook Express's Account Properties. Fill in the correct email address inside.
Q: The Server Says: 551 Delivery Not ALOWED To Non-local Recipient
Q: The Server Says: 553 Relay Restriction.
Q: The Server Says: 553 from <>, Message Blocked.
Q: The Server Says: 553 Sorry, you are not allow to use this smtp to relay your eami
Q: The Server Says: 553 Sorry, That Domain Isn't in My List of Allowed RCPTHOSTS
A: When using the SMTP server such as 21cn.com, China.com, 371.net, sina.com, etc., you can only use your own mailbox, so "Personal" in Outlook Express "Account Properties" Information is filled in the correct email address.
Q: The Server Says: 505 Client Was Not Authenticated
Q: The Server Says: 553 Authentication is Required to send mail as <>
A: When using 263.NET and SOHU.com's SMTP server, not only use its own mailbox, but also to join authentication, so if you want to fill in the correct email address in "Personal Information", and select the SMTP server. Require certification.
Q: The Server Says: 535 Error: Authenticatin Faled
Q: The Server Says: 535 Authentication Unsuccessful
Q: The Server Says: 452 Insufficient System Storage
A: In the process of using the ESMTP authentication, check the ESMTP settings, try more.
Q: The Server Says: 553 <> ... Domain Name Required
Q: The Server Says: 550 Unable to relay for ...
A: Multiple appearance When you send mail with a Wingate proxy server. Although "POP3 Mail Case Account" in Wingate is to use the "User Name # POP3 address" format, but in "Personal Information" in the Account Properties, I still have to fill in the general format.
Q: The Server Says: 553 Mailbox Name Not ALLOWED
A: The recipient email address is not allowed, and if the recipient address is correct.
Q: The Server Says: 553 Sorry, your envelop sender is in My BadmailFrom Lista: The server limits the address of the recipient and can only change the SMTP server.
Q: The Server Says: 554 Transaction Faled
Q: The Server Says: 451 Requested Action Aborted, Errno = 28
A: Transmission failed, checking network issues.
Q: The Server Says: 503 Error: Needmail Command
Q: The Server Says: 503 NEED MAIL BEFORE RCPT.
Q: The Server Says: 503 Bad Sequence of Commands
A: Message command order error, generally appear after other errors, first check the previous error prompts.
Q: The Server Says: 501 Syntax.helo Hostname
Q: The Server Says: 501 Invalid Domain Name
Q: The Server Says: 502 Unmeplement Command
Q: The Server Says: 503 5.0.0 Polite People Say Helo First
Q: The Server Says: 533 Relay Restriction
Q: The Server Says: 544 <>: Recipient Address Rejected: Relay Access Denied
A: The syntax error in the transmission is unknown.
