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I have some kind of a problem with a mail server :

I installed postfix + dovecot + roundcube on a debian sqeeze.

sending and receiving mail from roundcube work perfectly but i cant't send mail from an external client such as outlook but i can receiv mail from pop3 or imap perfectly.

i have always the same error but, i can't find a solution on the internet :

: Helo command rejected: need fully-qualified hostname; from= to= proto=ESMTP helo=

Here is my postfix's main.cf :

# See /usr/share/postfix/main.cf.dist for a commented, more complete version

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
delay_warning_time = 1h

readme_directory = no

# TLS parameters
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.

myhostname = coruscant.kilkoa.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
#mydestination = mail.kilkoa.com, 9274hd61061, localhost.localdomain, localhost
#relayhost =
mynetworks = [::ffff:]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all

virtual_uid_maps = static:3000
virtual_gid_maps = static:3000
virtual_mailbox_base = /home/mailer

virtual_transport = dovecot

virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_mailbox_domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf
relay_domains = mysql:/etc/postfix/mysql_relay_domains.cf

smtpd_recipient_restrictions =

smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous

dovecot_destination_recipient_limit = 1

Does someone have any idea ?

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1 Answer 1

up vote 2 down vote accepted

During the SMTP transaction when someone is sending you mail, The conversation starts with the person trying to send you mail saying something like this:

HELO rmotehostname.domain.com

The error you are getting:

: Helo command rejected: need fully-qualified hostname; from= to= proto=ESMTP helo=

is saying that the hostname they send is not a fully-qualified hostname. So instead of sending something like "remotehostname.domain.com" they are sending just "remotehostname. You reject this because you explicitly set reject_non_fqdn_hostname in your smtpd_recipient_restrictions.

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Oh, thank you, i have'nt seen that, i "sharped" reject_non_fqdn_hostname and it's working. –  scipio Feb 8 '12 at 14:54

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