Help about slow mail sending (could it be Xmail configuration related, or not?)

[Stefano Pascucci]

Hi all

I use xmailserver since many years withou any kind of trouble, but
since few months I'm experiencing some oddness in mail sending, so
I'm here to ask you help to understand if it can be related to
xmailserver wrong configuration, or if it depends on other stuffs.

The problem I have is the excessive delay in mail sending when using
php scripts to send an email.

The machine is win2000 server, with php 4.4.9 and IIS 5

Using a standard mailer client (outolook, pegasus or any other one),
all seems to go fine (I can't see any delay in mail sending)

When I try to use a script, I have the delay.

I have tested it in various scenarious:

1) NOCC webmail interface: if I write an email using a web browser,
after sending it I have ~30-35 seconds of delay before receiving the
next webpage indicating that the email has been sent.

2) joomla websites: after completing an order or filling & sending a
form, the confirmation webpage (shown when the mail associated to the
order or to the form has been sent) arrive to my browser after ~30-35
second of delay

3) os commerce websites: the same as point 2

I'm not a mailserver and php scripts expert, so I can't understand if
this situation may be related to something wrong in xmailserver
configuration, or to normal operation performed by the system (i.e.,
a delay due to the time the mailserver requires to reach and scan the
internet spamlist we use to reduce spam) or to any other possible
wrong configuration in my system.

My goal is to reduce this delay to a reasonable time: I have to setup
some ecommerce websites, and I can't ask to the customer to wait for
30-40 seconds before receiving a reply from a website :-)

I hope someone could help me :-)

Thank you in advance

Regards

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[Davide Libenzi]

On Tue, 22 Sep 2009, Stefano Pascucci wrote:

> Hi all
>
> I use xmailserver since many years withou any kind of trouble, but
> since few months I'm experiencing some oddness in mail sending, so
> I'm here to ask you help to understand if it can be related to
> xmailserver wrong configuration, or if it depends on other stuffs.
>
> The problem I have is the excessive delay in mail sending when using
> php scripts to send an email.
>
> The machine is win2000 server, with php 4.4.9 and IIS 5
>
> Using a standard mailer client (outolook, pegasus or any other one),
> all seems to go fine (I can't see any delay in mail sending)
>
> When I try to use a script, I have the delay.
>
> I have tested it in various scenarious:
>
> 1) NOCC webmail interface: if I write an email using a web browser,
> after sending it I have ~30-35 seconds of delay before receiving the
> next webpage indicating that the email has been sent.
>
> 2) joomla websites: after completing an order or filling & sending a
> form, the confirmation webpage (shown when the mail associated to the
> order or to the form has been sent) arrive to my browser after ~30-35
> second of delay
>
> 3) os commerce websites: the same as point 2
>
> I'm not a mailserver and php scripts expert, so I can't understand if
> this situation may be related to something wrong in xmailserver
> configuration, or to normal operation performed by the system (i.e.,
> a delay due to the time the mailserver requires to reach and scan the
> internet spamlist we use to reduce spam) or to any other possible
> wrong configuration in my system.
>
> My goal is to reduce this delay to a reasonable time: I have to setup
> some ecommerce websites, and I can't ask to the customer to wait for
> 30-40 seconds before receiving a reply from a website :-)

You should probably ask who wrote the PHP code ;)
Does the PHP sender use sendmail to send an email, or it uses SMTP
directly?
IMO such delay is related to DNS queries, either to get the host name
attached to the local XMail server IP, or to resolve CustMapsList queries.
Try to disable RDNS checks inside the server.tab, and also empty
CustMapsList, and see if it helps. If it does, your DNS/network config is
the problem.


- Davide


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