Connection timed out:7025 - Issue

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hank314
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Joined: Fri Mar 31, 2017 10:44 am

Connection timed out:7025 - Issue

Postby hank314 » Fri Feb 16, 2018 9:00 am

Hi,
in a new installation of Zimbra 8.8.6 sometimes outgoing mails remain in queue:

Feb 16 08:56:10 zimbra postfix/error[5351]: 85994198DF65B: to=<xxx@xxx.xx>, relay=none, delay=119, delays=0.08/118/0/0, dsn=4.4.1, status=deferred (delivery temporarily suspended: connect to zimbra.xx.xx[Public_IP] 7025: Connection timed out)
Feb 16 08:56:10 zimbra postfix/lmtp[2704]: connect to zimbra.xx.xx[Public_IP]:7025: Connection timed out

If i requeue the mails are correctly sent..

I checked my firewall/dnsServer configurations but i don't see issues (the standard zimbra ports are open and the dns works).

Any help?


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DualBoot
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ZCS/ZD Version: ZCS FLOSS - 8.7.11 Mutli servers

Re: Connection timed out:7025 - Issue

Postby DualBoot » Fri Feb 16, 2018 10:32 am

Hello,

this is not an outgoing mail but an ingoing mail.
7025 port is related to mailboxd, so you must investigate into the following logs :
- mailbox.log
- zmmailboxd.out

Regards,
Klug
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Re: Connection timed out:7025 - Issue

Postby Klug » Fri Feb 16, 2018 1:44 pm

Double check your DNS too or split-DNS.
hank314
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Re: Connection timed out:7025 - Issue

Postby hank314 » Fri Feb 16, 2018 2:59 pm

This was my resolv.conf file:

nameserver Ip_internalDNS
nameserver 8.8.8.8
nameserver 127.0.0.1
search xxx.xx

I change with:
nameserver Ip_internalDNS
nameserver 127.0.0.1

It seems like sometimes Zimbra uses the pubblic DNS server to resolve zimbra.xxx.xx
In other installations with these parameters I have no problems
Klug
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Re: Connection timed out:7025 - Issue

Postby Klug » Fri Feb 16, 2018 4:00 pm

If your ZCS server is on a LAN that is natted to the internet, you should only (*) use internal resolver(s) and split-DNS.
When natted, you should never define both an internal and external resolver (*).

(*) it might work with using public resolvers if your firewall is able to do hairpining (https://en.wikipedia.org/wiki/Hairpinning).
However, that would need you have port 7025 natted too and that's not a good idea.
hank314
Posts: 8
Joined: Fri Mar 31, 2017 10:44 am

Re: Connection timed out:7025 - Issue

Postby hank314 » Mon Feb 19, 2018 10:53 am

it's work!
Thanks.
hank314
Posts: 8
Joined: Fri Mar 31, 2017 10:44 am

Re: Connection timed out:7025 - Issue

Postby hank314 » Tue Feb 20, 2018 1:58 pm

The issue has returned (yesterday..): sometimes the nameserver it is solved with external address.

Dns split is configured with Windows Dns server. (checked)

These are the main configuration files:

/etc/resolv.conf
nameserver 127.0.0.1
nameserver InternalWindowsDNS


/etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
IPZimbra zimbra.xx.xx zimbra

cat /etc/hostname
zimbra.xx.xx


I try some configuration, without results..

Thanks

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