Mail Issue (Virtual Hosting Howto With Virtualmin On CentOS 5.1)

Discussion in 'HOWTO-Related Questions' started by skybrush, Sep 30, 2009.

  1. skybrush

    skybrush New Member


    I'm running a dedicated server. Linux Distri.: CentOS release 5.3 (Final) - fresh installation.

    I'm following TopDog's Guide Virtual Hosting Howto With Virtualmin On CentOS 5.1(
    Everything works so far but I'm having trouble setting up Postfix right.
    Currently I'm using the sample config file. On trying to send an email via Telnet, I get the following error:
    [[email protected] postfix]# telnet 25
    Trying xx.75.244.195...
    Connected to (xx.75.244.195).
    Escape character is '^]'.
    220 tds mail cluster
    mail from: [email protected]
    503 5.5.1 Error: send HELO/EHLO first
    helo me
    mail from: [email protected]
    451 4.7.1 Service unavailable - try again later
    Any ideas? I love Linux, but this Postfix thingy makes me insane.
    command_directory = /usr/sbin
    daemon_directory = /usr/libexec/postfix
    mydomain =
    myorigin = $mydomain
    unknown_local_recipient_reject_code = 550
    unverified_recipient_reject_code = 550
    unverified_sender_reject_code = 550
    mynetworks =
    alias_maps = hash:/etc/aliases
    alias_database = hash:/etc/aliases
    virtual_alias_maps = hash:/etc/postfix/virtual
    canonical_maps = hash:/etc/postfix/canonical
    sender_canonical_maps = hash:/etc/postfix/canonical
    recipient_canonical_maps = hash:/etc/postfix/canonical
    address_verify_map = btree:/var/spool/postfix/verify
    smtpd_sender_restrictions = hash:/etc/postfix/sender_access
    mail_spool_directory = /var/spool/mail
    home_mailbox = Maildir/
    smtpd_sasl_type = dovecot
    smtpd_sasl_path = private/auth
    smtpd_use_tls = yes
    smtpd_tls_key_file = /etc/pki/postfix/key.pem
    smtpd_tls_cert_file = /etc/pki/postfix/server.pem
    smtpd_tls_CAfile = /etc/pki/postfix/root.crt
    smtpd_tls_loglevel = 1
    smtpd_tls_received_header = yes
    smtpd_tls_session_cache_timeout = 3600s
    smtpd_tls_session_cache_database = btree:/var/spool/postfix/smtpd_tls_cache
    smtp_use_tls = yes
    smtp_tls_key_file = /etc/pki/postfix/key.pem
    smtp_tls_cert_file = /etc/pki/postfix/server.pem
    smtp_tls_CAfile = /etc/pki/postfix/root.crt
    smtp_tls_session_cache_database = btree:/var/spool/postfix/smtp_tls_cache
    smtp_tls_note_starttls_offer = yes
    smtpd_tls_auth_only = yes
    tls_random_source = dev:/dev/urandom
    smtpd_sasl_auth_enable = yes
    debug_peer_level = 2
    debugger_command =
    	 xxgdb $daemon_directory/$process_name $process_id & sleep 5
    sendmail_path = /usr/sbin/sendmail.postfix
    newaliases_path = /usr/bin/newaliases.postfix
    mailq_path = /usr/bin/mailq.postfix
    setgid_group = postdrop
    html_directory = no
    manpage_directory = /usr/share/man
    sample_directory = /usr/share/doc/postfix-2.3.3/samples
    readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
    smtpd_banner = tds mail cluster
    smtpd_helo_required = yes
    disable_vrfy_command = yes
    show_user_unknown_table_name = no
    policy_time_limit = 3600
    smtpd_milters = unix:/var/clamav/clmilter.socket unix:/var/run/spamass.sock
    non_smtpd_milters = unix:/var/clamav/clmilter.socket unix:/var/run/spamass.sock
    smtpd_error_sleep_time = 5s
    smtpd_soft_error_limit = 10
    smtpd_hard_error_limit = 20
    smtpd_data_restrictions = reject_unauth_pipelining
    smtpd_recipient_restrictions =
     	check_recipient_access hash:/etc/postfix/access
     	check_policy_service unix:private/spfpolicy
  2. falko

    falko Super Moderator ISPConfig Developer

    Have you tried this with an email client such as Thunderbird or Outlook?
    Any errors in your mail log?
  3. skybrush

    skybrush New Member

    Hi and thank you for replying.

    POP3 seems to work. If I try to send an email via Thunderbird it's the same error 4.7.1 "Service unavailable - try again later."
  4. skybrush

    skybrush New Member

    Oct  1 19:01:19 QJH002 postfix/cleanup[6510]: warning: connect to Milterservice unix:/var/clamav/clmilter.socket: Connection refused
    Oct  1 19:01:19 QJH002 postfix/cleanup[6510]: BE1A710A01D9: milter-reject: CONNECT from localhost[]: 4.7.1 Service unavailable - try again in later; from=<[email protected]>
    Oct  1 19:01:19 QJH002 postfix/cleanup[6510]: BE1A710A01D9: milter-reject: CONNECT from localhost[]: 4.7.1 Service unavailable - try again later; from=<[email protected]>
  5. skybrush

    skybrush New Member

    After commenting out the milters I get 5.7.1 Relay Access Denied if i try to mail to extern domains, or 5.1.1 Recipient address rejected: undeliverable address: User unknown.
  6. falko

    falko Super Moderator ISPConfig Developer

    Did you enable "Server requires authentication" in your email client?
  7. skybrush

    skybrush New Member


    Yay, wrong TLS cert - no problem. I gonna manage this soon enough as I can recieve emails from It won't verify my domain if I don't click the activation link which i will probably never get. Isn't it ironic? I already tried to load the default postfix-conf and put my domain in. Still "I can break rules too, goodbye" error - and no mails incoming.

    I'm really stressed. I wanna set this mail server up for virtual domains. I'm no idiot but it makes me think I'm retarded. -.-

    Ok, here we go. I followed this tut . Mail recieved, domain verified. I gonna work this out, again, very meticulous. Stay tuned.

    edit #2:
    Thank you so much. I'm always happy, getting pushed into the right direction. So the main problem was a bad certificate. Now i got one from Afterwards I scrolled up the mail user manager of virtualmin - and it seems that i always logged in with the wrong account infos. In the end it was just the false loginname. It wasn't mailman but mailman.mydomain.
    Right now I'm having little issue with pop3, but don't worry friends ^^ - it worked, i make it work again.

    The End
    It works. THANK YOU! :D
    Last edited: Oct 2, 2009

Share This Page