- Can you send email from Gmail/Hotmail and other ISP to your mail server? What's the error message in Postfix log file?
- Did you change other Postfix settings? Please show us the output of command 'postconf -n' here to help troubleshoot.

I can see where a lot of users has had this issue, but besides editing the smtpd_recipient_restrictions field, which I did an attempt to fix my problem; I still don't know how others are resolving this problem! Can anyone share any insight there experience with this issue and what was done to resolve it?

As far s I know it is but, I will restart it.

Still no idea at all, sorry.

- Did you change any settings/config files? Please clearly explain what you changed.
- Is user "user.name@mydomain2day.com" a virtual mail account stored in LDAP or a Unix system account?
- Does this issue happen again if you comment out "relayhost =" in Postfix main.cf?

I did as you asked and I put a #comment in front of relayhost =, and I still got the same results. In reviewing my Wireshark capture I can see where the email actually connects, it just appears that nothing happen once the mail hits my server! Very unusual. For gigles I'm going to show you the ouput of my master.cf file.

# Postfix master process configuration file.  For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       -       -       -       smtpd
#amavis    unix  -       -       n       -       4       smtp
#  -o smtp_data_done_timeout=1200
#  -o smtp_send_xforward_command=yes
#  -o disable_dns_lookups=yes
#  -o max_use=20
#smtp      inet  n       -       n       -       1       postscreen
#smtpd     pass  -       -       n       -       -       smtpd
#dnsblog   unix  -       -       n       -       0       dnsblog
#tlsproxy  unix  -       -       n       -       0       tlsproxy
#submission inet n       -       n       -       -       smtpd
#  -o smtpd_tls_security_level=encrypt
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o milter_macro_daemon_name=ORIGINATING
#smtps     inet  n       -       n       -       -       smtpd -o smtpd_tls_wrappermode=yes
#  -o smtpd_tls_wrappermode=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o smtpd_sasl_auth_enable=yes
#  -o milter_macro_daemon_name=ORIGINATING
#628       inet  n       -       n       -       -       qmqpd
#pickup    fifo  n       -       n       60      1       pickup
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       n       300     1       oqmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
proxywrite unix -       -       n       -       1       proxymap
smtp      unix  -       -       n       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       n       -       -       smtp
        -o smtp_fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
retry     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
#localhost:10025 inet   n       -       n       -       -       smtpd
#  -o content_filter=
#  -o smtpd_delay_reject=no
#  -o smtpd_client_restrictions=permit_mynetworks,reject
#  -o smtpd_helo_restrictions=
#  -o smtpd_sender_restrictions=
#  -o smtpd_recipient_restrictions=permit_mynetworks,reject
#  -o smtpd_data_restrictions=reject_unauth_pipelining
#  -o smtpd_end_of_data_restrictions=
#  -o smtpd_restriction_classes=
#  -o mynetworks=127.0.0.0/8
#  -o smtpd_error_sleep_time=0
#  -o smtpd_soft_error_limit=1001
#  -o smtpd_hard_error_limit=1000
#  -o smtpd_client_connection_count_limit=0
#  -o smtpd_client_connection_rate_limit=0
#  -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks,no_address_mappings
#  -o local_header_rewrite_clients=
#  -o local_recipient_maps=
#  -o relay_recipient_maps=
scache    unix  -       -       n       -       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/local/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=/usr/lib/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/local/sbin/bsmtp -f $sender $nexthop $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}
#
#procmail  unix  -       n       n       -       -       pipe
#  flags=R user=nobody argv=/usr/bin/procmail -t -m /etc/procmailrc ${sender} ${recipient}
#
# Bypass checks for internally generated mail.
pickup    fifo  n       -       n       60      1       pickup
  -o content_filter=
submission inet n       -       n       -       -       smtpd
  -o smtpd_enforce_tls=yes
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_mynetworks,permit_sasl_authenticated,reject
#  -o content_filter=smtp-amavis:[127.0.0.1]:10026

# Use dovecot deliver program as LDA.
dovecot unix    -       n       n       -       -      pipe
    flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${domain}
smtp-amavis unix -  -   -   -   2  smtp
    -o smtp_data_done_timeout=1200
    -o smtp_send_xforward_command=yes
    -o disable_dns_lookups=yes
    -o max_use=20

127.0.0.1:10025 inet n  -   -   -   -  smtpd
    -o content_filter=
    -o local_recipient_maps=
    -o relay_recipient_maps=
    -o smtpd_restriction_classes=
    -o smtpd_delay_reject=no
    -o smtpd_client_restrictions=permit_mynetworks,reject
    -o smtpd_helo_restrictions=
    -o smtpd_sender_restrictions=
    -o smtpd_recipient_restrictions=permit_mynetworks,reject
    -o mynetworks_style=host
    -o mynetworks=127.0.0.0/8
    -o strict_rfc821_envelopes=yes
    -o smtpd_error_sleep_time=0
    -o smtpd_soft_error_limit=1001
    -o smtpd_hard_error_limit=1000
    -o smtpd_client_connection_count_limit=0
    -o smtpd_client_connection_rate_limit=0
    -o receive_override_options=no_header_body_checks,no_unknown_recipient_checks,no_address_mappings

Could you please turn on debug mode in Postfix and paste related log to help troubleshoot?

To enable debug mode in Postfix, please append '-v' in transport 'smtp' in file /etc/postfix/master.cf. For example:

Restarting Postfix service, monitor its log file, resend an testing email from Gmail, and paste related Postfix log here.

The warning message below does not make any sense because when I look at the details of these two files they are identical, but yet at times the message still occurs.

Mar  7 05:28:27 mail postfix/postfix-script[20310]: warning: /var/spool/postfix/etc/hosts and /etc/hosts differ

Zhang,

I actually did that and restarted postfix earlier after I got that message but unfortunately it still did not resolve my issue, and I am still getting the same error for incoming email from my domain. But when I do a postfix check I know longer get that error.

/usr/sbin/postfix check

Mar  7 10:16:36 mail postfix/smtpd[25950]: connect from mail-gy0-f171.google.com[209.85.160.171]
Mar  7 10:16:37 mail postfix/smtpd[25950]: NOQUEUE: reject: RCPT from mail-gy0-f171.google.com[209.85.160.171]: 554 5.7.1 <mail-gy0-f171.google.com[209.85.160.171]>: Client host rejected: Access denied; from=<mygmail@gmail.com> to=<user.name@mydomain2day.com> proto=ESMTP helo=<mail-gy0-f171.google.com>
Mar  7 10:16:37 mail postfix/smtpd[25950]: disconnect from mail-gy0-f171.google.com[209.85.160.171]

You know I hate to ask this question but I have been putting a lot of energy into trying to find a resolution for this issue, and since this is a new server with nothing really nothing on it but this application; you think maybe I should remove iRedMail, and tr try to go through the install process again? The environment that this will be in is for a small home based business behind a dynamic DNS address, with about four email users to start. I'm just running out of ideas of what could be causing this problem!

Yes, and in wireshark I can see the connection and commication on that port

Zhang,

After reading some other Postfix information, I am wondering if my issue is the way I had to configure my postfix server? My environment is going to be really small in which I don't plan on hosting emil for any more domains, but in the installation process it appeared that the only option I had to was too create virtual domains. Once I completed the install I created the virtual domain for the for the accounts that I plan on using primarily which is the same domain my email server is in, but yet in my postfix main.cf, I don't have nothing configured for virtual_mailbox_domains=; could this be my problem?

I mean the primary domain that the server is in is also my virtual domain and I don't plan on creating any more domains!

Well I am able to send email via a relay host just fine, and like I said I can see the email SMTP protocol via port 587 and the Ehlo per failed email.