List of common error reports for Linux email servers

Article Title: list of common error reports for Linux email servers. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

Server 400 Error Report

Q: 421 Server too busy

A: Unable to connect because the recipient's server is faulty. This is the SMTP session of the recipient's server Full or because the recipient's server Traffic cannot connect to the new SMTP. Please try again later. If an error persists, contact the recipient's administrator.

Q: 421-Microsoft esmtp mail Service, Version: 5.0.2195.5600 ready at Service not available, closing transmission channel

A: The recipient's Microsoft ESMTP server fails to work properly. Please try again later. If an error persists, contact the recipient's administrator.

Q: 421 4.3.1 illegal from Sorry. Your IP has problems. This Connection will be closed. Please mail to mailsysop@hanmir.com (by using another e-mail server ). Thank you.

A: sending restriction error caused by incorrect recipient's IP address. Send an email to the displayed consultation email address.

Q: 421 4.3.2 Your IP (xxx. xxx) is filtered and this connection will be closed. You must register your IP to spammaster@hanafos.com By SpaceLee, the Lord of mail server

A: The sender's IP address is used to log on to the www.hanafos.com website as a spam email. Send an email to the displayed consultation email address.

Q: 421 4.3.2 Your IP (xxx. xxx) is filtered and this connection will be closed. You must register your IP to http://realip.naver.com.

A: The sender's IP address is A restriction error caused by SPAM email logon on www.naver.com. Refer to the spam policy of naver.com.

Q: 441 4.4.1 No answer from host

A: The recipient's email server has no connection to the failed response. Please try again later. If an error persists, contact the recipient's administrator.

Q: 441 4.4.1 temporay dns failed

A: errors caused by spam violations of hanmail.net when connecting to hanmail.net. Contact ext. 1544 for extension 2.

Q: 450: Recipient address rejected: Greylisted for 300 seconds (see http://isg.ee.ethz.ch/tools/postgrey/help)

A: The sender's email address has been logged on to the Graylisting System of the recipient and there is an error that causes the email to be extended.

Q: 451 4.4.0 DNS resolving error

A: The recipient's website is not found. Check whether the email server's DNS server is running properly. You can try sending emails by referring to DNS of other ISP companies.

Q: 451 4.3.0 Other or undefined mail system status

A: The recipient's email system PROTOCOL is incorrect or the Connected Server is not an SMTP error.

Q: 451 4.3.0 Temporary system failure. Please try again later

A: an error occurs when the recipient's server fails to receive the parcel.

Q: 451 4.4.2 Bad connection (io timeout)

A: an error occurs because the recipient's server response time exceeds the disconnection time. Please try again later. If an error persists, contact the recipient's administrator.

Q: 451 Relay Server Not Ready

A: errors caused by abnormal functions of the recipient's server. Please try again later. If an error persists, contact the recipient's administrator.

Q: 452 sorry, your recipient address is not in my local list

A: The recipient's email server does not have the sent address. Check whether the recipient's email address is correct and whether the address exists in the recipient's actual address.

Q: 452 4.4.5 Requested mail action aborted: exceeded storage allocation

A: errors caused by insufficient storage space on the recipient's email server. Contact the recipient's administrator.

Q: 452 4.4.5 Disk write/Insufficient disk space error occurred

A: errors caused by insufficient storage space on the recipient's email server. Contact the recipient's administrator.

Q: 452 4.4.5 Insufficient disk space; try again later

A: errors caused by insufficient storage space on the recipient's email server. Contact the recipient's administrator.

Q: 452 4.4.5 MailBox or MessageQuota exceed

A: The recipient's personal mailbox space is insufficient. Contact the recipient's administrator.

Server 500 Error Report

Q: 5XX you must be spam

A: The sender's email server URL, IP address, and email address are thrown into the junk list by the recipient's email server. Ask the recipient's administrator to delete the spam list.

Q: 5XX Your envelope sender is enlisted as spammer

A: an error occurs when the sender's email address is determined by the recipient's email server as A spam email address. Ask the recipient's administrator to delete the spam list.

Q: 500 Syntax error, command unrecognized

A: errors caused by some missed or incorrect commands in SMTP commands.

Q: 500 File Sending Error

A: The transfer fails due to network barriers and other reasons.

Q: 501 Denied domain name

A: an error occurs when the sender's website is rejected by the recipient's server.

Q: 501 Bad sender address expression

A: The email address of the sender or recipient is incorrect. Check whether the sender's email address is correct.

Q: 501 Argument missing

A: errors caused by some missed or incorrect commands in SMTP commands.

Q: 501 5.1.8 Sender domain must exist

A: The recipient's xxx.com website does not exist. Check whether the URL in the recipient's email address is correct. If the address is correct, contact the recipient's administrator to check whether the email server has been logged on to the actual website.

Q: 503 Bad sequence of commands

A: errors caused by some missed or incorrect commands in SMTP commands.

Q: 504 You are registered as spammer

A: The sender's email server URL, IP address, and email address are determined by the recipient's email server as the email address in the spam list. Ask the recipient's administrator to delete the spam list.

Q: 504 We do not accept mail from spammers. if you have questions, please Email

A: The sender's email server URL, IP address, and email address are determined by the recipient's email server as addresses in the spam list. Ask the recipient's administrator to delete the spam list.

Q: 511 sorry, no mailbox here by that name (#5.1.1-chkuser)

A: The recipient's email address does not exist on the recipient's email server. Check whether the recipient's address is correct. Check whether the recipient's account is usable and ask the recipient's administrator.

Q: 550 No inbox

A: The recipient's email address does not exist on the recipient's email server or is out of use. Check whether the recipient's address is correct. Check whether the recipient's account is usable and ask the recipient's administrator.

Q: 550 User unknown

A: The recipient's email address does not exist on the recipient's email server or is out of use. Check whether the recipient's address is correct. Check whether the recipient's account is usable and ask the recipient's administrator.

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