Multiple emails sent to customers - been changing sending rates
I have been having this problem as well for months. I have been working with the number of emails sent per number of minutes with a number of seconds between. I have gone from 200 emails per 10 minutes per 3 seconds between to extremes of 200 emails per 30 minutes with 9 seconds in between and I have had several people receive emails from 3- 6 multiple emails with the same time stamp. I have also had some people not receive any emails.
Also with this process when sending the emails the program starts sending the emails and then at one point says null of null complete so I then have to click on the send button again and it continues, but this happens several time through out the mailing process. I also get an error code when sending the emails out see below:
Invalid JSON: <br />
<b>Warning</b>: file_get_contents(../../webassist/email/PM_Mailing_75_Progress_xml.php) [<a href='plugins/function.file-get-contents'>function.file-get-contents</a>]: failed to open stream: No such file or directory in <b>/hermes/waloraweb044/b2035/moo.kgoodvault6464/PJS_site/Prescott_Jazz_Summit/powermessenger/admin_pm/common/sendProgress_xml.php</b> on line <b>6</b><br />
Also when I send a preview I get a huge error message ( I will attach) even though it sends the preview.
I really need to fix this because my email recipients are getting irritated. Please help.