Email Server question - Tilted Forum Project Discussion Community

TheProf · 04-13-2010, 11:07 PM

Hello,

Hope everyone is doing well.

I am running a CentOS 5.4 email server and it's been working great. It is a Postfix/dovecot box that handles email via squirrelmail via IMAP.

It's been working fine for a year via the webmail interface. Basically it sends and receives emails no problem within the same network.

Now we're expanding to allowing people to connect via IMAP externally to the mail server. This is where things get all weird.

People are able to connect (I'm using Evolution as a test) no problem and download their mail, folders, etc via IMAP. But it's impossible to send. SMTP just won't work.

I am not sure how to start debugging this problem. Is it that the SMTP request isn't getting through (IE: being blocked by the ISP)? Is it that it is getting through but they are using the wrong authentication (was not needed prior since it was all local network before)? Is it just some sort of voodoo magic that is preventing it all?

So I'm at a total loss. What should I do or where should I start? The logs show nothing out of the ordinary!

Thanks so much!

Code:

[root]:[mail]#postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
broken_sasl_auth_clients = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter = amavisfeed:[127.0.0.1]:10024
daemon_directory = /usr/libexec/postfix
debug_peer_level = 2
home_mailbox = Maildir/
html_directory = no
inet_interfaces = all
local_recipient_maps =
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 20971520
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
mydomain = example.org
myhostname = mail.example.org
mynetworks = 127.0.0.0/8, 192.168.1.0/24
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
sample_directory = /usr/share/doc/postfix-2.3.3/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_delay_reject = yes
smtpd_helo_required = yes
smtpd_helo_restrictions = permit_mynetworks,    reject_non_fqdn_helo_hostname,    reject_invalid_helo_hostname,    permit
smtpd_recipient_restrictions = reject_unauth_pipelining,   reject_non_fqdn_recipient,   reject_unknown_recipient_domain,   permit_mynetworks,   permit_sasl_authenticated,   reject_unauth_destination,   reject_rbl_client zen.spamhaus.org,   reject_rbl_client bl.spamcop.net,   permit
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_sender_restrictions = permit_mynetworks,    reject_non_fqdn_sender,    reject_unknown_sender_domain,    permit
unknown_local_recipient_reject_code = 550

Code:

[root]:[mail]#dovecot -n
# 1.0.7: /etc/dovecot.conf
login_dir: /var/run/dovecot/login
login_executable(default): /usr/libexec/dovecot/imap-login
login_executable(imap): /usr/libexec/dovecot/imap-login
login_executable(pop3): /usr/libexec/dovecot/pop3-login
mail_location: maildir:~/Maildir/
mail_debug: yes
mail_executable(default): /usr/libexec/dovecot/imap
mail_executable(imap): /usr/libexec/dovecot/imap
mail_executable(pop3): /usr/libexec/dovecot/pop3
mail_plugins(default): quota imap_quota
mail_plugins(imap): quota imap_quota
mail_plugins(pop3):
mail_plugin_dir(default): /usr/lib/dovecot/imap
mail_plugin_dir(imap): /usr/lib/dovecot/imap
mail_plugin_dir(pop3): /usr/lib/dovecot/pop3
imap_client_workarounds(default): delay-newmail outlook-idle netscape-eoh
imap_client_workarounds(imap): delay-newmail outlook-idle netscape-eoh
imap_client_workarounds(pop3): outlook-idle
pop3_client_workarounds(default):
pop3_client_workarounds(imap):
pop3_client_workarounds(pop3): outlook-no-nuls oe-ns-eoh
auth default:
  mechanisms: plain login
  verbose: yes
  debug: yes
  passdb:
    driver: pam
  userdb:
    driver: passwd
  socket:
    type: listen
    client:
      path: /var/spool/postfix/private/auth
      mode: 432
      user: postfix
      group: postfix
plugin:
  quota: maildir:storage=409600
  trash: /etc/dovecot-trash.conf