0
Introduction
I recently installed postfix 3.3.0 on an Ubuntu 18.04.3 LTS virtual machine.
To test the installation, I am using out-of-the-box configuration, which means I did not change anything yet. Only during the installation, I chose Internet site
and inserted my fqdn example.com
. I want to be able to send and deliver email from and to my domain. Simply, one server to handle all mail.
Let's assume my domain name is example.com
.
Sending
I can send out emails successfully. I tried to send an email with sendmail myemailaddress@gmail.com
from my server. In my gmail inbox I can see that the sender address is ubuntu@example.com
. Everything seems OK on the sending part.
Receiving
I can also receive emails from some addresses which I have tested. As can be seen from the logs in /var/log/mail.log
:
Nov 11 21:57:44 mail postfix/smtpd[24956]: connect from f175.i.mail.ru[94.100.178.161]
Nov 11 21:57:44 mail postfix/smtpd[24956]: EB5DA459A4: client=f175.i.mail.ru[94.100.178.161]
Nov 11 21:57:45 mail postfix/cleanup[24959]: EB5DA459A4: message-id=<1573509463.999760544@f175.i.mail.ru>
Nov 11 21:57:45 mail postfix/qmgr[24610]: EB5DA459A4: from=<myemailaddress@list.ru>, size=2917, nrcpt=1 (queue active)
Nov 11 21:57:45 mail postfix/local[24960]: EB5DA459A4: to=<ubuntu@example.com>, relay=local, delay=0.09, delays=0.08/0/0/0.01, dsn=2.0.0, status=sent (delivered to mailbox)
Nov 11 21:57:45 mail postfix/qmgr[24610]: EB5DA459A4: removed
Nov 11 21:57:45 mail postfix/smtpd[24956]: disconnect from f175.i.mail.ru[94.100.178.161] ehlo=2 starttls=1 mail=1 rcpt=1 data=1 quit=1 commands=7
There problem is, I cannot receive mail from gmail. When I am sending an email from my gmail account to ubuntu@example.com
, the following logs appear in my server a few seconds later:
Nov 12 08:30:25 mail postfix/smtpd[28230]: connect from mail-wr1-f44.google.com[209.85.221.44]
Nov 12 08:30:25 mail postfix/smtpd[28230]: NOQUEUE: reject: RCPT from mail-wr1-f44.google.com[209.85.221.44]: 454 4.7.1 <ubuntu@example.com>: Relay access denied; from=<myemailaddress@gmail.com> to=<ubuntu@example.com> proto=ESMTP helo=<mail-wr1-f44.google.com>
Nov 12 08:30:25 mail postfix/smtpd[28230]: disconnect from mail-wr1-f44.google.com[209.85.221.44] ehlo=2 starttls=1 mail=1 rcpt=0/1 data=0/1 quit=1 commands=5/7
What I am trying to understand is, is this a configuration problem on my side, or is this error happening in the gmail server and then forwarded to my server to let me know?
How can I try and fix this?
What would be the minimal, cleanest working configuration that I can use to be able to send and deliver to and from all other external mail-servers like a normal mail-server would work?
EDIT
As requested, here is the /etc/postfix/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 $mail_name (Ubuntu)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
readme_directory = no
# See http://www.postfix.org/COMPATIBILITY_README.html -- default to 2 on
# fresh installs.
compatibility_level = 2
# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
mydomain = example.com
myhostname = mail.$mydomain
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = $mydomain
mydestination = $myhostname, $mydomain, localhost, localhost.localdomain
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
As you can see, the only changes I have made so far to the default configuration, are to the mydomain
, myorigin
, myhostname
and mydestination
variables, as can be seen above. The issue is exactly the same.
EDIT 2
Here is the /etc/postfix/master.cf
file (I have not edited it):
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master" or
# on-line: http://www.postfix.org/master.5.html).
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (no) (never) (100)
# ==========================================================================
smtp inet n - y - - smtpd
#smtp inet n - y - 1 postscreen
#smtpd pass - - y - - smtpd
#dnsblog unix - - y - 0 dnsblog
#tlsproxy unix - - y - 0 tlsproxy
#submission inet n - y - - smtpd
# -o syslog_name=postfix/submission
# -o smtpd_tls_security_level=encrypt
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_tls_auth_only=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#smtps inet n - y - - smtpd
# -o syslog_name=postfix/smtps
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
-o syslog_name=postfix/$service_name
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
You should post your
main.cf
config – nKn – 2019-11-12T09:02:40.757@nKn Added the config – anddero – 2019-11-12T09:32:27.170
Have you restarted Postfix after the configuration edits? What TCP port is the VM receiving these connections to? (Is it port 25 or is it port 587?) Can you check whether master.cf (
postconf -Mf
) has any options under the "smtp" line? – user1686 – 2019-11-12T10:03:47.820@grawity I have added
master.cf
to the question. – anddero – 2019-11-12T10:14:21.323@grawity All connections are received on port 25 – anddero – 2019-11-12T10:35:35.533