[thelist] PHP Mail() function

Paul Waring paul at xk7.net
Fri May 30 03:41:35 CDT 2014

On Fri, May 30, 2014 at 05:15:05PM +1200, Santilal Parbhu wrote:
> I am using the PHP mail() function to send emails from a hosted server.
> Typically values are read from a mysql table and put into an email when
> requested by a user.  Periodically some users have reported that the email
> doesn't get sent.  I have investigated and could not find any reason.  The
> host provider also could not help.  Just today I was changing the formatting
> of the email message.  To test the formatting I sent test emails to myself.
> After about an hour or so, the emails just stopped.  This was not related to
> any code change because I was only changing the structure of the body of the
> message.  The thought then occurred to me that perhaps there is a server
> setting that limits how many emails can be sent in a certain period of time.
> Does anyone know if this is possible?

It's certainly possible for servers to limit outgoing messages in a
given time period, either by number of recipients or number of messages,
or a combination of the two.

Paul Waring

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