My Postfix server wont allow SMTP from my web server (running
RoundCube webmail) which happens to be on the same network / subnet as
my Postfix mail server. My mail server is running only Postfix &
Dovecot while my web server has Apache, RoundCube, & PostgreSQL
installed:
mail = 192.168.0.200/24
web = 192.168.0.201/24
My Postfix configuration is set to allow anyone in 'mynetworks' to
send mail so I don't understand why my web server gets an error (SMTP
Error (250) Authentication Failure). Below is my
/etc/postfix/mynetworks file contents:
[r...@mail ~]# cat /etc/postfix/mynetworks
127.0.0.0/8
192.168.0.0/24
When I run Postfix in debug mode for only the I.P. of my web server, I
really don't understand what I see in the logs. I can see the webmail
client connecting (TLS) & then announce a HELO but it doesn't
recognize or like the HELO value and appears to reset the connection
and fail. I've tried disabling TLS in my Postfix configuration and I
get the same results. I then configured a mail client (Thunderbird) to
send / receive mail on the same network / subnet as both servers and
it sends perfect. It's only with webmail (RoundCube) that I have this
issue. I understand that Postfix is working fine but I'm asking for
help using Postfix to understand what it doesn't like about my
RoundCube or web server. When I login to webmail, it does render all
IMAP folders / messages perfect so Dovecot appears to be happy and
doing it's thing. I just can't send any emails from webmail only. I'm
posting my 'postconf -n' output below:
alias_database = $alias_maps
alias_maps = hash:/etc/postfix/aliases
bounce_queue_lifetime = 1d
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
debug_peer_list = 192.168.0.201
delay_warning_time = 4h
home_mailbox = mail/
inet_interfaces = all
inet_protocols = ipv4
mail_owner = postfix
manpage_directory = /usr/share/man
message_size_limit = 20480000
mydestination = $myhostname, $mydomain, mail.$mydomain
mydomain = iamghost.org
myhostname = mail.iamghost.org
mynetworks = $config_directory/mynetworks
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
recipient_delimiter = +
relayhost =
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
smtp_helo_timeout = 60s
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_scache
smtpd_recipient_restrictions =
permit_mynetworks, reject_unauth_destination,
reject_non_fqdn_recipient,
reject_unknown_recipient_domain, reject_non_fqdn_helo_hostname,
reject_invalid_helo_hostname, reject_rbl_client zen.spamhaus.org,
reject_rbl_client bl.spamcop.net, check_client_access
hash:/etc/postfix/client_access
smtpd_sender_restrictions = permit_mynetworks
smtpd_tls_cert_file = /etc/ssl/certs/mail.crt
smtpd_tls_key_file = /etc/ssl/private/mail.key
smtpd_tls_loglevel = 1
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:/var/lib/postfix/smtpd_scache
unknown_local_recipient_reject_code = 450
Can anyone please assist me in understanding what is causing this
issue between Postfix and RoundCube connections? I've got the output
of my debug logs for 192.168.0.201 (web server) but don't want to post
them unless asked so I'm omitting that until someone requests to see
it. Any info or help is greatly appreciated!
