(05-03-02) List of scattered problems on the email server and netengine and Solutions

1. An email in the attachment format of RAR cannot be sent. The error is 451 QQ temporary problem (#4.3.1)

Solution: this problem cannot be solved for the time being. It is a functional defect of clamav. ClamAV cannot decompress RAR files.

I saw an article yesterday.ArticleThe RAR format is not free for commercial users. This is probably the reason.

2. The webmail custom email rule is incorrect. The system prompts that the gb2312 character set is not supported.

3. The netengine web server cannot connect to the database after more than 50 concurrent users

Solution: Copy my. CNF of a medium-sized database to netengine.

4. After the ClamAV scans the email, all the alarm messages are sent to the Postmaster mailbox, which makes the mailbox crowded.

5. Install spamassassin scan rules, especially Chinese rules.

Solution: temporarily use the RBL list of China Anti-Spam alliance to prevent spam.

6. Solve the Problem of the content of the netengine syslog. conf file.

Solution: Completed

7. Many spam sources use forged source addresses to send spam to 56net mail servers, and they are all sent to non-existing email accounts.

Solution: configure the email server to discard the emails with secondary bounce. Contact Sina to add 56net.com to their whitelist.