delivery temporarily suspended: conversation with, 127.0.0.1[127.0.0.1] timed out while receiving the initial server greeting

[Noah]

Sometimes when sending mail to my postfix server I receive the claim
that "delivery temporarily suspended: conversation with,
127.0.0.1[127.0.0.1] timed out while receiving the initial server
greeting" . I am seeing this message show up to the local user and also
to the remote sender inbox too. The messages to both user accounts are
definitely originating from my postfix server - IPs and message IDs
verified.

Ive seen a few messages on the subject matter after using my favorite
search engine but wondering what the latest story is on what could
create this added mail delivery issue. Granted nothing changed on my
configuration for over 2 weeks now so it was an introduction based on
something caused by "normal" operation did.

restarting postfix did not clear it. a reboot to the server (I know its
not a PC) cleared the problem.

Here is the partial message:

---- snip ----

Subject: Delayed Mail (still being retried)


This is the mail system at host domain.com.

####################################################################
# THIS IS A WARNING ONLY. YOU DO NOT NEED TO RESEND YOUR MESSAGE. #
####################################################################

Your message could not be delivered for more than 4 hour(s).
It will be retried until it is 5 day(s) old.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<na...@domain.com> (expanded from <na...@domain.com>): conversation with
127.0.0.1[127.0.0.1] timed out while receiving the initial server
greeting


**** rest of the message

---- snip ----

If you note I am using smtp-amavis as my content filter. I am
wondering if there are some fine tune settings I should be considering
for amavis. Are there some links to a tutorial that explains how to
fine tune this content filter?

$ sudo postconf -n
alias_database = hash:/etc/postfix/aliases
hash:/var/lib/mailman/data/aliases
alias_maps = hash:/etc/postfix/aliases hash:/var/lib/mailman/data/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = smtp-amavis:[127.0.0.1]:10024
delay_warning_time = 4h
inet_interfaces = all
inet_protocols = all
mailbox_command = /usr/bin/procmail
mailbox_size_limit = 0
mydestination = $myhostname, localhost.$mydomain $mydomain localhost
mydomain = example.com
myhostname = example.com
mynetworks = <my_ethernet_ip>/32 127.0.0.0/8 [::ffff:127.0.0.0]/104
[::1]/128
myorigin = example.com
readme_directory = no
recipient_delimiter = +
relayhost =
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions =
permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
smtpd_tls_CAfile = /etc/ssl/certs/cacert.pem
smtpd_tls_cert_file = /etc/ssl/certs/smtpd.crt
smtpd_tls_key_file = /etc/ssl/private/smtpd.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550
virtual_alias_domains = <many virtual domains>
virtual_alias_maps = hash:/etc/postfix/virtual
hash:/var/lib/mailman/data/virtual-mailman

$ sudo cat mail.info | grep "conversation with"| grep "127" | less
Dec 23 20:54:22 example postfix/smtp[26588]: 004D36C68D:
to=<user...@example.com>, orig_to=<user...@example.com>,
relay=127.0.0.1[127.0.0.1]:10024, delay=302, delays=1.6/0/300/0,
dsn=4.4.2, status=deferred (conversation with 127.0.0.1[127.0.0.1] timed
out while receiving the initial server greeting)

[Reindl Harald]

Am 05.01.2012 17:18, schrieb Noah:
>
> Sometimes when sending mail to my postfix server I receive the claim that "delivery temporarily suspended:
> conversation with, 127.0.0.1[127.0.0.1] timed out while receiving the initial server greeting" . I am seeing this
> message show up to the local user and also to the remote sender inbox too. The messages to both user accounts are
> definitely originating from my postfix server - IPs and message IDs verified.

this is not a postfix-problem
postfix is only the messenger that your amavis is sucking

[Noel Jones]

On 1/5/2012 10:18 AM, Noah wrote:
>
> Sometimes when sending mail to my postfix server I receive the claim
> that "delivery temporarily suspended: conversation with,
> 127.0.0.1[127.0.0.1] timed out while receiving the initial server
> greeting" . I am seeing this message show up to the local user and
> also to the remote sender inbox too. The messages to both user
> accounts are definitely originating from my postfix server - IPs and
> message IDs verified.
>

...
> $ sudo postconf -n
...

> content_filter = smtp-amavis:[127.0.0.1]:10024

...

>
> $ sudo cat mail.info | grep "conversation with"| grep "127" | less
> Dec 23 20:54:22 example postfix/smtp[26588]: 004D36C68D:
> to=<user...@example.com>, orig_to=<user...@example.com>,
> relay=127.0.0.1[127.0.0.1]:10024, delay=302, delays=1.6/0/300/0,

> dsn=4.4.2, status=deferred (conversation with 127.0.0.1[127.0.0.1]
> timed out while receiving the initial server greeting)

Apparently your amavisd isn't running. Likely restarting amavisd,
rather than rebooting, would have fixed the problem.

Likely your amavis logs show more information. Ask for further help
on the amavis-users mail list.


-- Noel Jones