timeout problem on inbound and outbound SMTP
in [Postfix]
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From: Charles Gregory on 4 May 2010 16:33 On Tue, 4 May 2010, Nataraj wrote: > I do not have a front end on my mailserver. All incoming mail comes directly > into postfix. I am running a vpostmaster install which is not a front end, I'm not an expert on this, but your machine ID's with 'vpostmaster' in the greeting, so that means it is pretty tightly integrated, if not in fact a front-end. So I would go through your vpostmaster settings. You may have specified something as seconds when it is meant to be hundredths, etc... - C
From: Nataraj on 4 May 2010 16:58 Charles Gregory wrote: > On Tue, 4 May 2010, Nataraj wrote: >> I do not have a front end on my mailserver. All incoming mail comes >> directly into postfix. I am running a vpostmaster install which is >> not a front end, > > I'm not an expert on this, but your machine ID's with 'vpostmaster' in > the greeting, so that means it is pretty tightly integrated, if not in > fact a front-end. So I would go through your vpostmaster settings. You > may have specified something as seconds when it is meant to be > hundredths, etc... > > - C It means that the mail_name parameter is set in /etc/postfix/main.cf See: http://www.postfix.org/postconf.5.html#mail_name I am extensively familiar with my main.cf file and am aware of exactly what changes have been made. This mail server has been running stably for years and I am not yet aware of changes to the mail configuration files surrounding the time when this problem came up. There are quite a number of mailserver packages out their that use postfix as the MTA. I'm extensively familiar with the architectures of both the postfix and vpostmaster systems and I assure you that there is no front end. The port 25 service on my mailserver is the postfix smtpd. Vpostmaster, is simply a policy and transport agent with spam management and a web based GUI for management. It's quite nice and I highly recommend it to people. Nataraj
From: Wietse Venema on 4 May 2010 17:40 Nataraj: > I am extensively familiar with my main.cf file and am aware of exactly > what changes have been made. This mail server has been running stably > for years and I am not yet aware of changes to the mail configuration > files surrounding the time when this problem came up. > > There are quite a number of mailserver packages out their that use > postfix as the MTA. I'm extensively familiar with the architectures of > both the postfix and vpostmaster systems and I assure you that there is > no front end. The port 25 service on my mailserver is the postfix > smtpd. Vpostmaster, is simply a policy and transport agent with spam > management and a web based GUI for management. It's quite nice and I > highly recommend it to people. If the Postfix SMTP server hangs after 10s and no such smtpd_timeout is in main.cf, then either the smtpd_timeout value is taken from master.cf, or it is taken from a different main.cf file. It is worthwhile at this point to do find / -name main.cf -ls and see what shows up. Wietse
From: Charles Gregory on 4 May 2010 17:45 On Tue, 4 May 2010, Nataraj wrote: > > I am extensively familiar with my main.cf file and am aware of exactly what > changes have been made. This mail server has been running stably for years > and I am not yet aware of changes to the mail configuration files > surrounding the time when this problem came up. Then maybe it is not the postfix alone that has the problem? Try a manual telnet to port 110 and see if you get the same quick timeout.....? - C
From: Nataraj on 4 May 2010 21:23
Wietse Venema wrote: > Nataraj: > >> I am extensively familiar with my main.cf file and am aware of exactly >> what changes have been made. This mail server has been running stably >> for years and I am not yet aware of changes to the mail configuration >> files surrounding the time when this problem came up. >> >> There are quite a number of mailserver packages out their that use >> postfix as the MTA. I'm extensively familiar with the architectures of >> both the postfix and vpostmaster systems and I assure you that there is >> no front end. The port 25 service on my mailserver is the postfix >> smtpd. Vpostmaster, is simply a policy and transport agent with spam >> management and a web based GUI for management. It's quite nice and I >> highly recommend it to people. >> > > If the Postfix SMTP server hangs after 10s and no such smtpd_timeout > is in main.cf, then either the smtpd_timeout value is taken from > master.cf, or it is taken from a different main.cf file. > > It is worthwhile at this point to do > > find / -name main.cf -ls > > and see what shows up. > > Wietse > Thank you everyone for your helpful responses. I've narrowed the problem down further, though it is not solved yet. It does not appear to be specific to postfix. I've written a simple program with a select statement that delays 10 seconds when run on any of my own computers, but when run on the virtual machine hosting my mailserver it returns immediately. I'm suspecting a vmware related problem, but I don't know yet... Here's the program.... #include <stdio.h> /* #include <sys/select.h> */ #include <sys/time.h> #include <sys/types.h> #include <unistd.h> int main() { fd_set set; struct timeval timeout; int filedes = STDIN_FILENO; FD_ZERO (&set); FD_SET (filedes, &set); timeout.tv_sec = 10; timeout.tv_usec = 0; select(FD_SETSIZE, &set, NULL, NULL, &timeout); } |