Search found 7 matches

by rjorodrigues
Tue May 12, 2020 2:55 pm
Forum: Administrators
Topic: Connection time out in email server test
Replies: 0
Views: 805

Connection time out in email server test

Hi, I am using email server testing sites as a practice to check for possible problems. I am having the following feedback from all of them. Scenario: Release 8.8.15.GA.3829.UBUNTU16.64 UBUNTU16_64 FOSS edition, Patch 8.8.15_P9. Log: May 12 11:31:29 postfix/postscreen[1024]: DISCONNECT [34.194.69.11...
by rjorodrigues
Tue Jun 18, 2019 5:52 pm
Forum: Administrators
Topic: 451 Temporary local problem - please try later --> How to solve this?
Replies: 0
Views: 618

451 Temporary local problem - please try later --> How to solve this?

Hello folks, Our zimbra environment has worked for years and I hardly have any problems, but these last days one of them has taken me to sleep and I would like to help you to see if we have a problem or not (I bet 2 cents which is not my problem). A certain business partner of ours has his domain al...
by rjorodrigues
Tue Feb 14, 2017 1:47 pm
Forum: Administrators
Topic: [SOLVED] Test result on mailraidar.com: Do I have a problem? Help me solve it?
Replies: 1
Views: 635

Re: [SOLVED] Test result on mailraidar.com: Do I have a problem? Help me solve it?

Solution: $IPT -A POSTROUTING -t nat -p tcp -dport 25 -d 10.4.2.47 -j MASQUERADE Don´t use MASQUERADE mode with NAT. So... $ IPT -A POSTROUTING -t nat -p tcp -dport 25 -d 10.4.2.47 Hello guys, Below is the result of open relay testing for my domain, I would like your help in the following: 1) Do all...
by rjorodrigues
Tue Feb 14, 2017 10:12 am
Forum: Administrators
Topic: [SOLVED] Test result on mailraidar.com: Do I have a problem? Help me solve it?
Replies: 1
Views: 635

[SOLVED] Test result on mailraidar.com: Do I have a problem? Help me solve it?

Hello guys, Below is the result of open relay testing for my domain, I would like your help in the following: 1) Do all of these tests indicate that I have a problem? 2) If yes, how do I configure each of these tests to pass on the next attempt? My scenario. 8.7.1_GA_1670.FOSS (build 2016102045114) ...
by rjorodrigues
Mon Feb 13, 2017 11:10 am
Forum: Administrators
Topic: Normal behavior or it´s a fail!?
Replies: 4
Views: 1812

Re: Normal behavior or it´s a fail!?

Your trusted network are quite large as it will become your source of problem. If you have wrong configuration on your router and incorrect setting on DNAT makes all of external incoming mail will be wrongly identified as private IP of router, then your mail server will be end up as open relay. And...
by rjorodrigues
Wed Feb 08, 2017 10:08 pm
Forum: Administrators
Topic: Normal behavior or it´s a fail!?
Replies: 4
Views: 1812

Re: Normal behavior or it´s a fail!?

Thanks for the feedback.

This MTA server is behind an FW (IPTables) that only redirect ports 25, 465, 587, and 995.

My trusted networks: 127.0.0.0/8 [:: 1] / 128 10.4.0.0/16

Zimbra.Log
...
http://pastebin.com/Wdht79aD
by rjorodrigues
Wed Feb 08, 2017 5:56 pm
Forum: Administrators
Topic: Normal behavior or it´s a fail!?
Replies: 4
Views: 1812

Normal behavior or it´s a fail!?

Hi Folks, The system is notifying me thousands of emails like this (below), I've done everything, best practices zimbra, dkim, dmarc, blocking several IP in FW known as spammers etc ... Actually I have doubt if it is normal behavior of Zimbra and (or) is a problem, of type, there is some breach in s...

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