<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#ffffff"> On 4/13/2011 2:27 AM, Nicolas Barcet wrote: <blockquote cite="mid:4DA54239.4060208@canonical.com" type="cite"> <pre wrap="">On 04/13/2011 03:33 AM, Lox wrote: </pre> <blockquote type="cite"> <pre wrap="">Hello, I face a problem on my shared hosting server. I have a user that regularly sends some newsletters to about 5000 recipients. When this happens, it prevents other user from sending and receiving message for more than 12 hours. There are many options in postfix so I am not sure which one to tune up to prevent such an issue, can anyone advices me on that ? Any advices on my postfix (attached) configuration is also greatly appreciated... </pre> </blockquote> <pre wrap=""> My solution for this is to have a different postfix server handling the distribution of mailing lists and newsletters than the one handling my regular emails. Mailing list even have their own subdomains "lists.mydomain.com" so that the mx is handling emails (and bounces) separately from others. Nick </pre> </blockquote> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Times New Roman'; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; font-size: medium;">Just reduce main.cf:default_process_limit so you don't try to run an insane number of email deliveries in parallel. <pre class="moz-signature" cols="72">-- Regards -------------------------------------- Gerald Drouillard Technology Architect Drouillard & Associates, Inc. <a class="moz-txt-link-freetext" href="http://www.Drouillard.biz">http://www.Drouillard.biz</a></pre> </body> </html>