Re: Tool(s) for locating Postfix Bottlenecks to increase performance?
> > default_process_limit is set to what? > > We haven't set it, so I presume that means it's using the default of > 100. I just checked, and we're using 44 of them. For what? smtp? smtpd? pstree output can help - it shows lines like: ||-8*[smtp] ||-32*[smtpd] > I'm gonna take a hard look at the PHP script running the mailer > through SwiftMailer today. At first I was thinking disk IO, but CPU is > seeming to be a strong culprit. Yeah, maybe it's too slow at generating the mails. -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
Re: Tackling looping auto-reply / auto-forward mails
On 27/07/2011 16:56, Roger Goh wrote: > If users send mails to abc@postfix_pop3.com, I don't get > this looping problem; it's only when they send mails to > abc@exchange_pop3.com. > > Also, previously when POP3 was enabled on Exchange 2003 > server & "auto-forwarding" was not set up on the Exchange > mailbox, I don't get this looping mails issue. > > If it's not appropriate to mail replies/solutions to postfix group, > appreciate if anyone can email me directly. Flooded with mails... Intercept one of the emails which has looped several times and examine all the received headers - this normally gives you a clue on the message path and you can work back from there to understand the rules causing it to loop My best guess would be the exchange autoforwarder is doing something unexpected Good luck Ed W
Delivery rate
Hi list, does anybody have experienced data about the delivery rate of a single postfix smtp server in the following scenario - server is a Dell PowerEdge 2850 - 2x Intel(R) Xeon(R) CPU - 4 GiB memory - running a caching DNS resolver locally - 75 MiBit/s backbone to the internet Thanks, Martin -- Martin Bley smime.p7s Description: S/MIME cryptographic signature
Re: possible compromised system
On 07/27/11 17:41, Reindl Harald wrote: > > > Am 27.07.2011 23:22, schrieb Wietse Venema: >> >> Is this machine running a webserver? Look in the access logs > > if this is the reason consider disable smtp on 127.0.0.1 > because most of dumb injected scripts are trying this instead > the network address! > > disable php's mail()-function and every function > which can excecute shell commands is mandatory > (shell_exec, exec, popen...) You can't really disable mail() on a web host, but PHP recently made it not-impossible to monitor its use: http://www.php.net/manual/en/mail.configuration.php#ini.mail.log
Re: possible compromised system
Am 28.07.2011 15:49, schrieb Michael Orlitzky: > On 07/27/11 17:41, Reindl Harald wrote: >> >> >> Am 27.07.2011 23:22, schrieb Wietse Venema: >>> >>> Is this machine running a webserver? Look in the access logs >> >> if this is the reason consider disable smtp on 127.0.0.1 >> because most of dumb injected scripts are trying this instead >> the network address! >> >> disable php's mail()-function and every function >> which can excecute shell commands is mandatory >> (shell_exec, exec, popen...) > > You can't really disable mail() on a web host, but PHP recently made it > not-impossible to monitor its use: i can and i do on a bundle of hosts for > 500 domains since nearly ten years - if you can't speak not for me! signature.asc Description: OpenPGP digital signature
Re: Delivery rate
On Thu, Jul 28, 2011 at 03:42:59PM +0200, Martin Bley wrote: > does anybody have experienced data about the delivery rate of a single > postfix smtp server in the following scenario Something between 2/s, if everything needs to go through a single spamassassin process doing expensive tests, and 3000/s, if you max out the connection with 3KiB mails. Please provide more information what you want to do. Bastian -- The heart is not a logical organ. -- Dr. Janet Wallace, "The Deadly Years", stardate 3479.4
Re: Delivery rate
Zitat von Martin Bley : Hi list, does anybody have experienced data about the delivery rate of a single postfix smtp server in the following scenario - server is a Dell PowerEdge 2850 - 2x Intel(R) Xeon(R) CPU - 4 GiB memory - running a caching DNS resolver locally - 75 MiBit/s backbone to the internet You have omitted some relevant facts: - The performance of the I/O system (bandwidth/latency)? - Where do you deliver to (outgoing-only, relay, mixed)? - If outgoing only, how do you feed in the mails to send? Assuming you do outgoing only with a clean list and many different targets you should achieve something in the line of some hundred mails/second without problems. The game is out if your list contain a big share to only a small number of freemailers like yahoo,hotmail,gmx etc. With this you should try to get on their whitelists. Regards Andreas smime.p7s Description: S/MIME Cryptographic Signature
Re: Delivery rate
Hi Andreas, sorry for the personal reply, here again as a List-Reply. * lst_ho...@kwsoft.de am 28.07.11, 17:43: > You have omitted some relevant facts: > > - The performance of the I/O system (bandwidth/latency)? > bandwidth is 75 MiBit/s. I don't know about latency, because access to the provider is not granted yet. > - Where do you deliver to (outgoing-only, relay, mixed)? > outgoing-only > - If outgoing only, how do you feed in the mails to send? > it's a web application using double opt-in procedure. The app will admit via smtp. The size of one e-mail is about 10 KiB. I have absolutely no clue, how many people will subscribe, but the web application will be announced via newscast, thus I just want to be prepared. > Assuming you do outgoing only with a clean list and many different > > targets you should achieve something in the line of some hundred > > mails/second without problems. The game is out if your list contain > > a big share to only a small number of freemailers like > > yahoo,hotmail,gmx etc. With this you should try to get on their > > whitelists. > Thanks, Martin -- Martin Bley smime.p7s Description: S/MIME cryptographic signature
Re: Delivery rate
Hi Bastian, * Bastian Blank am 28.07.11, 17:13: > Please provide more information what you want to do. sorry, please see my reply <20110729061552.GA3407@bvl-bsn004> Thanks, Martin smime.p7s Description: S/MIME cryptographic signature
