английский знаете? мне некогда переводить корректно 🙂
для общего развития так сказать relayhost пригодится, если

When a mail system does not have adequate connectivity or all of the information it needs to relay messages, it can forward them to another system that is in a better position for relaying.

Loops back to myself перевод

Post by rokka » Thu Dec 24, 2009 12:48 am

So, everything works very well, except for the mail delivery admin user, for example daily reports. Mail for admin@example.com is ok, but not for admin@mail01.example.com

Since zimbra host now is mail01.example.com, zimbra tries to deliver reports to this new address admin@mail01.example.com
The first question: is this a correct behaviour and maybe I need to add something to the configuration (MTA)?

If this is correct (I don’t see the reason why it shouldn’t be), then I’d like to ask for help fixing the error with «loops back to myself» (see log below)
This is a short description of my zimbra 6x installation:
DNS server is on the same host, it has split views.

Mailflow on this zimbra host is ok: incoming, outgoing. I use this host to deliver mail for a few domains: no issues, zimbra works very well.
zimbra@mail01:

Release 6.0.2_GA_1912.UBUNTU8 UBUNTU8 FOSS edition.
#zimbra@mail01:

mail01.example.com
#dig example.com mx

example.com. 3600 IN MX 5 mail01.example.com.
I even set the mx for the mail01.example.com, but it didn’t help:
#dig mail01.example.com mx

mail01.example.com. 3600 IN MX 10 mail01.example.com.
#zimbra@mail01:

172.0.50.50 mail01.example.com mail01
These are the errors I see in logs, when I try to generate daily reports:
Dec 24 01:02:51 mail01 postfix/smtp[8772]: 3B97454E53B: to=, relay=none, delay=0.03, delays=0.01/0.02/0/0, dsn=5.4.6, status=bounced (mail for mail01.example.com loops back to myself)

Dec 24 01:02:51 mail01 postfix/cleanup[8768]: 44E3754E53C: message-id=

Dec 24 01:02:51 mail01 postfix/bounce[8773]: 3B97454E53B: sender non-delivery notification: 44E3754E53C

Dec 24 01:02:51 mail01 postfix/lmtp[8774]: 44E3754E53C: to=, relay=mail01.example.com[172.0.50.50]:7025, delay=0.14, delays=0.01/0.01/0/0.12, dsn=2.1.5, status=sent (250 2.1.5 Delivery OK)

[SOLVED] mail for mail01.example.com loops back to myself

Post by phoenix » Thu Dec 24, 2009 11:41 am

Per ardua ad astra

[SOLVED] mail for mail01.example.com loops back to myself

Post by rokka » Thu Dec 24, 2009 11:42 am

UPDATE:
If I’m adding the hostname mail01.example.com to mydestination parameter then I’m getting «unknown user» error for the user admin@mail01.example.com

DNS Hostname Zimbra Hostname

[SOLVED] mail for mail01.example.com loops back to myself

Post by phoenix » Thu Dec 24, 2009 11:45 am

[quote user=»rokka»]If I’m adding the hostname mail01.example.com to mydestination parameter then I’m getting «unknown user» error for the user admin@mail01.example.com

zmprov ms mail01.example.com zimbraMtaMyDestination ‘localhost mail01.example.com'[/QUOTE]Reverse that change to it’s original setting.

Per ardua ad astra

[SOLVED] mail for mail01.example.com loops back to myself

Post by rokka » Thu Dec 24, 2009 11:49 am

[quote user=»10330phoenix»]Your hosts file should contain only the following lines (as per the Quick Start Installation Guide):
How did you change the hostname, in Zimbra or just in the hosts file? Does your admin user actually belong to a domain named: mail01.example.com?[/QUOTE]
My hosts file didn’t contain localhost.localdomain for loopback IP, but it’s not critical I think.
I changed hostname using zimbra control scripts (as described in wiki). User admin were in the domain example.com before.

It looks this way in zimbra admin console:
Domains:

*solved* Postfix ‘mail for domain.com loops back to myself’

IDFarm

New Pleskian

We are experiencing the ‘mail for domain.com loops back to myself’ issue on our VPS.
The domain.com always had it’s e-mail handled via an Exchange-server located outside of the Webdomain.
Let’s call the Exchange-server’s ip ‘exchange.server.ip’
We recently moved domain.com to a new VPS and and we’re experiencing the issue where every e-mail that is sent via the webserver (PHP mail()) does not get routed to the external Exchange-server.
I’ve searched the internet for this issue, and it seemed alot of threads/posts suggest solving this issue by changing the ‘mydestination’ parameter in the main.cf config file. However I tried multiple different setings, and all of them gave the following log-entries when trying to send a mail via the webserver to a @domain.com e-mailaddress:

I’ve added the postconf output file as ‘main config.txt’. Some changes I made during testing might still be present in the config. (i.e. mydestination parameter is empty)

Since this probably has something to do with DNS settings, I’ve added the DNS-settings for the domain where we try to send the mail from:

Summary:
Moved existing websites to a new VPS. E-mail has always been handled by an (external) Exchange-server.
Now the webserver on which the domain runs tries to handle sending the mail, without processing the MX-records (I believe) and routing it to the external Exchange server.

It is probably pretty obvious I am by no means an expert with CentOS and postfix, so I hope I am not missing a simple thing.

Hopefully someone knows why this is occuring, and knows a solution.

Postfix Relay Loops Back To Myself

I have 2 Server, let me illustration like this
Server A = Exchange Server(mail.fendyfy.com)
Server B = SMTP Server(Postfix) on VPS(smtp.fendyfy.com)
I want my Server A fully Sending&Receiving Email from Server B(Because Server A Port 25 is Blocked By ISP)
Now i already can Sending External Email by using smarthost and configure the port to 587
But i can’t Receiving External Email, the email status is Bounced, is there something wrong with my configuration?

2 Replies

EBS Computer Services is an IT service provider.

status=bounced (mail for fendyfy.com loops back to myself)

You need to set relayhost = mail.fendyfy.com

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