smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread francis picabia
Hi, The number of phishing or otherwise compromised accounts is needing an automation to manage it. Last night the spammers waited until the evening and simultaneously used 3 compromised accounts to send spam over secure smtp. A nagios alert on number of messages in the queue was our only

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread k...@rice.edu
On Wed, Feb 27, 2013 at 10:11:08AM -0400, francis picabia wrote: Hi, The number of phishing or otherwise compromised accounts is needing an automation to manage it. Last night the spammers waited until the evening and simultaneously used 3 compromised accounts to send spam over secure

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread Reindl Harald
Am 27.02.2013 15:11, schrieb francis picabia: The size of the message you are trying to send exceeds a temporary size limit of the server. The message was not sent; try to reduce the message size or wait some time and try again. The server responded: 4.5.3 Error: too many recipients.

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread Viktor Dukhovni
On Wed, Feb 27, 2013 at 10:11:08AM -0400, francis picabia wrote: The number of phishing or otherwise compromised accounts is needing an automation to manage it. Last night the spammers waited until the evening and simultaneously used 3 compromised accounts to send spam over secure smtp. A

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread francis picabia
On Wed, Feb 27, 2013 at 10:11 AM, francis picabia fpica...@gmail.comwrote: Hi, The number of phishing or otherwise compromised accounts is needing an automation to manage it. Last night the spammers waited until the evening and simultaneously used 3 compromised accounts to send spam over

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread Reindl Harald
Am 27.02.2013 21:45, schrieb francis picabia: I had a set of cascading iptables rules to rate limit new connections, but they circumvented this as well. Based on the IP, there were 5 connections per minute and 15 connections per 5 minutes. If those were exceeded, iptables would block that

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread Noel Jones
On 2/27/2013 2:45 PM, francis picabia wrote: Over 390 unique IPs simultaneously sent email at a gradual rate using 3 sets of compromised credentials. Use postfwd or similar policy service to rate-limit the total recipients per account over some period of time.

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread francis picabia
On Wed, Feb 27, 2013 at 4:52 PM, Reindl Harald h.rei...@thelounge.netwrote: Am 27.02.2013 21:45, schrieb francis picabia: I had a set of cascading iptables rules to rate limit new connections, but they circumvented this as well. Based on the IP, there were 5 connections per minute and

Re: smtpd_recipient_limit and the corresponding error pop up on secure smtp

2013-02-27 Thread francis picabia
On Wed, Feb 27, 2013 at 5:22 PM, Noel Jones njo...@megan.vbhcs.org wrote: On 2/27/2013 2:45 PM, francis picabia wrote: Over 390 unique IPs simultaneously sent email at a gradual rate using 3 sets of compromised credentials. Use postfwd or similar policy service to rate-limit the total