Qmail user verification problem set

Article Title: Qmail user verification problem set. 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.
1. qmail failed to send and receive emails using outlook. No prompt is displayed, but an error is reported on the telnet port.
2. After installing qmail, an error is displayed when you send emails from a local mailbox or an external mailbox.
3. How can users modify their qmail passwords?
4. Is the password of the user I added using vadduser always incorrect?
5. sqwebmail cannot modify the user password on the web interface.
　　
1. qmail failed to send and receive emails using outlook. No prompt is displayed, but an error is reported on the telnet port.
　　
Q: My system is redhat 7.0. I use qmail for sending and receiving, and store it in Maildir mode. But it didn't pass. I used outlook for sending and receiving without any prompts, but I couldn't send or receive emails, I use telnet my. domain 110, return:
　　　　
Trying 202.107.212.14 .....
Connected to www.nbid.com.cn.
Escape character is '^]'.
+ OK <8708.988511586@mail.nbid.com.cn>
-ERR authorization first
When I use telnet my. domain 25, return:
Trying 202.107.212.14 .....
Connected to www.nbid.com.cn.
Escape character is '^]'.
220 www.nbid.com.cn ESMTP
502 unimplemented (#5.5.1)
　　　　
A: The port is enabled normally. However, qmail can use both system authentication and databases, such as mysql. Check your compilation options. Use the password configuration file to add necessary users. Here, the checkpasswd package for password verification is not installed.
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2. After installing qmail, an error is displayed when you send emails from a local mailbox or an external mailbox.
　　
Q: Why is this error displayed when I use a local mailbox or an external mailbox?
Mar12 16:07:35 redhat_test qmail: 984384455.686852
Info msg 158686: bytes 1322 from qp 11203 uid 502
Mar12 16:07:35 redhat_test qmail: 984384455.826362
Starting delivery 12: msg 158686 to local aa@mydomain.com.cn
Mar12 16:07:35 redhat_test qmail: 984384455.826488
Status: local 1/10 remote 0/20
Mar12 16:07:35 redhat_test qmail: 984384455.837389
Delivery 12: failure: Sorry, _ no_mailbox_here_by_that_name. _ (#5.1.1 )/
In my/home/vpopmail/domains/mydomain.com/aaand aarespectively, the contents of the curs directory are all like this: vpopmail vchkpw is no problem, but it cannot be received. Can anyone help me? Thank you!
　　　
A: You have not created the user's Maildir directory. Remember that the group and user permissions for creating the maildir directory must be correct (generally, use the group and user that comes with qmail)
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3. How can users modify their qmail passwords?
　　
Q: I want to write a program. You can use a program like login to remotely log on to the user and change the password, but I don't know how to verify that the password entered by the user is the same as the password entered by vpopmail In the mysql database? I think the crypt function should be used, but an error is returned when calling the program. Do you have any other solutions for qmail users to modify their own passwords?
　　　
A: When Using vpopmail, you can use the vchkpw it provides to verify the password. In addition, we recommend that you use qmailadmin to manage qmail, which provides the functions you want.
　　　
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4. Is the password of the user I added using vadduser always incorrect?
　　
Q: When I installed qmail, I also installed checkpasswor and vpopmail. I used vadduser to add the correct password. Why do I always prompt me to enter the password when receiving emails using outlook. I can see a letter on the server, but I cannot accept it. It's okay to send it to a remote user. Thank you!
　　　　
A: QMAIL has A QMAIL-POP server, you can directly add it through USERADD after installation. After adding a new user, go to touch. qmail in the user's directory and Add./maildir to the file.
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5. sqwebmail cannot modify the user password on the web interface.
　　
Q: I installed qmail and encountered a problem in sqwebmail In the last step of installation: I cannot modify the user password through the web interface, however, other functions (such as logon and email browsing are all correct ). Ask here!
　　
A: sqwebmail seems to have A dedicated wb logon password. It is different from the system account used by qmail. If you need to change the password, you need to find A cgi program that can change the system password :)