Sender Rate Limit to Prevent SPAM

[cgonsalves]

Hello,

I would like to set per-hour/per-user limit for sent mails, can this done with Proxmox Mail Gateway?

If yes where and how can I implement the limits?


Clifford

 

[tom]

There are no such limits, not implemented.

 

[cgonsalves]

There are no such limits, not implemented.

Hello Tom,

I think this is a very important feature which should be added in the next version.
We are planning to implement 5 SMTP gateways in a cluster but must have sender based rate limits to prevent spam.

Clifford

 

[ananiasfilho]

@cgonsalves
You need do this on your MTA.
If you use zimbra, enable PolycD
- In portuguese [ Great Tutorial ] - https://respirandolinux.com.br/2019/05/01/zimbra-implementando-o-policyd-parte-1/

If you use another MTA, check how implement it on your MTA.

Also, i agree its a great FEATURE to be included on PMG since we can use PMG as Outgoing Mail Gateway to:
- Websites (send forms contacts)
- CRM
- Projects Management Tools
- Billings systems
- Monitoring Tools (Zabbix, Nagios, Cacti, etc)
- Deployment tools (Gitlab)
and many others tools and services.

@tom , how is possible we start a "New feature request" about this topic/item? Do you think we can have success about this request?

If necessary i can help on deployment procedures and tests.

 

[bougatoyta]

@cgonsalves
You need do this on your MTA.
If you use zimbra, enable PolycD
- In portuguese [ Great Tutorial ] - https://respirandolinux.com.br/2019/05/01/zimbra-implementando-o-policyd-parte-1/

If you use another MTA, check how implement it on your MTA.

Also, i agree its a great FEATURE to be included on PMG since we can use PMG as Outgoing Mail Gateway to:
- Websites (send forms contacts)
- CRM
- Projects Management Tools
- Billings systems
- Monitoring Tools (Zabbix, Nagios, Cacti, etc)
- Deployment tools (Gitlab)
and many others tools and services.

@tom , how is possible we start a "New feature request" about this topic/item? Do you think we can have success about this request?

If necessary i can help on deployment procedures and tests.

Thank's a lot I was looking for this feature and didn't know policyd !

I think implementing this in PMG should be discussed, It might be added as a rule in mail filtre combining a list of address in "Who" object and Action object.

Regards

 

[hata_ph]

try postfwd

http://postfwd.org/ratelimits.html

 

[bougatoyta]

try postfwd

http://postfwd.org/ratelimits.html

Thx for your reply, I've personally dealt with that on Zimbra with cbpolicyd but I'm keeping an eye on postfwd !

 

[cgonsalves]

I must say that PMG is missing a very very important feature of rate control and must be implement in the next version!! Outgoing SPAM can be controlled very easily if the rate control is implemented.

 

[steven99]

Would second a built-in rate control.

 

[killmasta93]

That would be amazing to implement it

 

[peganet]

Hello there,

PMG's intended use is to monitor SPAM traffic. The simplest solution to this is to have hourly, daily and monthly total mail sending limitations. We have directed many servers to PMG and we aim to manage traffic from there. Our aim is to reduce SPAM mail traffic in our network and to have 100% inbox of sent mails. If this is not possible via PMG GUI, it can be done by writing /32 based minute and hour rules with iptables rules. I haven't tried this yet but I think it might be a temporary solution.

 

[kez]

I would also like this feature to prevent spam outbreaks and general abuse.

 

[buftek]

Is there something new about this?
If someone hack just one of our users, it can lead to disaster. Please add hourly sending limit to my users.

 

[hoanv9]

You can try at https://forum.proxmox.com/threads/message_size_limit-per-domain.60148/