When using IP addresses in the email address, shouldn't the IP be
enclosed between []?
For example: noreply@[100.67.10.122] instead of noreply@100.67.10.122
Cheers,
K.
On 07/07/2021 17:49, j...@wrightthisway.com wrote:
Hello folks. I have set up a fresh instance of Postfix at my office to
help do some troubleshooting on another issue. There is a relay
upstream that is having issues forwarding mail from some devices here,
and this seemed the easiest way to get some data to help them
troubleshoot. Install is Redat 8.4 using the postfix install from YUM.
Everything is pretty much default settings.
This is what I'm seeing in the logs:
Jul 6 15:36:02 localhost postfix/smtpd[40841]: connect from
desktop-204qpi1.example.net[100.67.2.4]
Jul 6 15:36:20 localhost postfix/smtpd[40841]: warning: Illegal address
syntax from desktop-204qpi1.example.net[100.67.2.4] in MAIL command:
noreply@100.67.10.122
Jul 6 15:36:23 localhost postfix/smtpd[40841]: warning: Illegal address
syntax from desktop-204qpi1.example.net[100.67.2.4] in MAIL command:
noreply@100.67.10.122.
Jul 6 15:38:11 localhost postfix/smtpd[40841]: warning: Illegal address
syntax from desktop-204qpi1.example.net[100.67.2.4] in MAIL command:
<noreply@100.67.10.122>
Jul 6 15:38:48 localhost postfix/smtpd[40841]: disconnect from
desktop-204qpi1.example.net[100.67.2.4] mail=1/4 quit=1 unknown=0/1
commands=2/6
If I telnet to this postfix and use a mail from with an IP literal, it
fails, but a DNS name works. I can't seem to locate the proper command
to allow such emails to be received. These emails would be generated
from Dell servers via their iDrac (system management), temperature
probes, etc, so I have little control over how these devices send mail.
Mail delivery would be targeted to system admins needing to monitor
alerts from such systems.
Below is my postconf output:
[root@localhost postfix]# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
compatibility_level = 2
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd
$daemon_directory/$process_name $process_id & sleep 5
html_directory = no
inet_interfaces = all
inet_protocols = all
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
meta_directory = /etc/postfix
mydestination = $myhostname, localhost.$mydomain, localhost
mynetworks = 100.67.0.0/16
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix/README_FILES
sample_directory = /usr/share/doc/postfix/samples
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
shlib_directory = /usr/lib64/postfix
smtp_tls_CAfile = /etc/pki/tls/certs/ca-bundle.crt
smtp_tls_CApath = /etc/pki/tls/certs
smtp_tls_security_level = may
smtpd_tls_cert_file = /etc/pki/tls/certs/postfix.pem
smtpd_tls_key_file = /etc/pki/tls/private/postfix.key
smtpd_tls_security_level = may
unknown_local_recipient_reject_code = 550
