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  邮件服务器
关于Qmail问题集
点击:10148次 时间:2008-2-28 12:39:24
* Q: On my FreeBSD server, when I run the test_installation script that comes with qmail-scanner, I get the following error:

      Sending eicar test virus - should be caught by perlscanner module...
      qmail-inject: fatal: qq temporary problem (#4.3.0)
      Bad error. qmail-inject died

      Whats wrong?
    * Q: When compiling qmail, I get the following error:

      qmail-remote.c:36: openssl/ssl.h: No such file or directory

      whats wrong?
    * Q: I keep on getting tons of "double bounce" messages that say "I tried to deliver a bounce message to this address, but the bounce bounced!". What causes this and how can I stop it?
    * Q: When I try to send e-mail with Outlook or any other mail client, I get an error stating "sorry, that domain isnt in my list of allowed rcpthosts (#5.7.1)". What is causing this error?
    * Q: How can I disable qmail from conducting reverse DNS lookups on SMTP connections?
    * Q: Is there a way to customize my qmail servers pop greeting?
    * Q: How can I change the length of time that a given message will sit in the qmail queue before being dropped?
    * Q: I am running qmail-scanner with Spamassassin and ClamAV. When I run the qmail-scanner test script or when I view my logs, I see the following error:
      qmail-inject: fatal: qq temporary problem Bad error. qmail-inject died
    * Q: Ive got my qmail server up and running, but the smtp server is running extremely slow. Whats wrong?
    * Q: Is there a way in which I can limit the size of messages that my qmail server will accept?
    * Q: I am unable successfully login to my qmail server on port 110 (POP). When I view the qmail-pop3d logs, I see this error message:

      bind: address already used @40000000402764171035c1e4 tcpserver: fatal: unable to bind: address already in use

    * Q: What functions are possible with the "qmailctl" tool?
    * Q: How can I block a certain sender or an entire domain from sending mail to my Qmail server?
    * Q: Ive only got one domain on my server. Can I install Qmail without Vpopmail since I dont plan on having multiple domains?
    * Q: When my Qmail server bounces messages, it comes from "mailer-daemon@mydomain.com". Can I change that?
    * Q: What is the purpose of each of the Qmail control files within the /var/qmail/control directory?
    * Q: How do I set my Qmail server up to allow authenticated users to remotely send mail through my server?
    * Q: My Internet Server Provider (ISP) blocks 3rd party connections to port 25, so I cannot send mail. What can I do?
    * Q: What is "smtp authentication", what is "pop before smtp" and which is better?
    * Q: When I test my Qmail server for an open relay at http://www.abuse.net/relay.html, it says "Hmmn, at first glance, host appeared to accept a message for relay..." Does this mean my Qmail server is an open relay???
    * Q: Does the Qmailrocks.org Qmail installation prevent open relaying and/or how do I prevent Qmail from being an open relay?
    * Q: I want to be able to backup my mail data. How can I do this?

 
Q:
 On my FreeBSD server, when I run the test_installation script that comes with qmail-scanner, I get the following error:

Sending eicar test virus - should be caught by perlscanner module...
qmail-inject: fatal: qq temporary problem (#4.3.0)
Bad error. qmail-inject died

Whats wrong?
A:
 This error is typically encounted after the latest version of Perl is installed from the FreeBSD ports collection with the "ENABLE_SUIDPERL" option disabled. The solution is to reinstall Perl with the "ENABLE_SUIDPERL" feature enabled. Please see this page: http://freebsd.qmailrocks.org/suidperl.htm
   
   return to top
 
Q:
 When compiling qmail, I get the following error:

qmail-remote.c:36: openssl/ssl.h: No such file or directory

whats wrong?
A:
 You need to install both openssl and openssl-devel. On Redhat related products, you can find rpms of both openssl and openssl-devel. The up2date package manager is usually the best way to go on Redhat products. On Debian, you will want to installed openssl and libssl-dev like so:

apt-get install openssl
apt-get install libssl-dev
   
   return to top
 
Q:
 I keep on getting tons of "double bounce" messages that say "I tried to deliver a bounce message to this address, but the bounce bounced!". What causes this and how can I stop it?
A:
 Double bounces are typically caused when a spammer sends an email to an email address that does not exist on your server. By default, the server will try to bounce the message because that mailbox could not be found. However, if the return address that the spammer uses is fake, then the bounced message will also bounce and be returned to your server. Thus a "double bounce".

To greatly reduce the numbers of double bounce messages, you can instruct vpopmail to delete these emails that are being sent to invalid addresses on your server instead of attempting to bounce them. On a QMR install, you can do this by logging into the qmailadmin interface as the postmaster user for each domain. Click on "email accounts" and then click "Set catchall to delete". This will set your domains cathcall function to "delete", thus deleting any an all emails send to invalid addresses and avoiding the potential double bounce. These days, acutally using a catchall is a pretty dumb idea. In this day and age, all a catchall does is catch all the SPAM. Disable the catchall function by setting it to delete and your inbox and mail server will both thank you.
   
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