Which parameters of zimbra or postfix limit the number or rate of emailing

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tuandungtb89
Posts: 15
Joined: Mon Jul 11, 2016 11:23 am

Which parameters of zimbra or postfix limit the number or rate of emailing

Postby tuandungtb89 » Wed Dec 13, 2017 4:41 am

Hi,
I have a email system using zimbra opensource.

My system have 2 MTA server and relay outbound to a Barracuda Spam Gateway.

The follow send outbound email: Client --(1)--> MTA --(2)--> Barracuda --(3)--> Internet --(4)--> Reception server

When users in my system get infected with the virus and send a lot of spam to the outside then in MTA zimbra log, I got this error at connection (2) between MTA and Barracuda: (For almost email sending in this time)

> Dec 12 00:18:00 mta1 postfix/smtp[21868]: 1683011C254D: to=<refdfgfg@yahoo.com>, relay=x.x.x.x[x.x.x.x]:25, delay=0.07, delays=0.03/0.02/0.01/0, dsn=4.4.2, status=deferred (lost connection with x.x.x.x[x.x.x.x] while sending RCPT TO)


(x.x.x.x is Barracuda IP)

On the barracuda server I did not see any connection information at the time.

I think this is some parameter of zimbra or postfix limiting the sending of too many emails to one address in a time period.

Does anyone know about this bug? Please help me.
Thank you very much!


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stefaniu.criste
Posts: 41
Joined: Wed Feb 12, 2014 5:40 am
Location: Romania
ZCS/ZD Version: 8.8.8_GA_1728 20180614052922 201806
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Re: Which parameters of zimbra or postfix limit the number or rate of emailing

Postby stefaniu.criste » Wed Dec 13, 2017 4:52 am

Stefaniu Criste - managing partner
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tuandungtb89
Posts: 15
Joined: Mon Jul 11, 2016 11:23 am

Re: Which parameters of zimbra or postfix limit the number or rate of emailing

Postby tuandungtb89 » Wed Dec 13, 2017 8:01 am

Hi,
I don't config any rule in policyd and there is no match log in cbpolicyd.log when this happen.
Any other ideal?

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