If you're using Exim4 and PHP as a module or as a CGI with suexec. You may have noticed some issues with your mail. Specifically you would have noticed that either the "From:" header was using "[email protected]" or "[email protected] name, its also possibly that you had an additional header called "Sender:".
There are two things you need to do to fix this. You first need to make sure that your "php.ini" has the following value "sendmail_path = /usr/sbin/sendmail -t -i". Which is the default, double check this variable as it might be set to something else.
I was recently having issues with my phone not being able to use 3G, and I thought it might have been a firmware or possibly hardware issue. But after troubleshooting for some time, I found that it was in fact applications crashing or firmware bugs.
Hearing more and more reports of network issues with 3G and iPhones, Wired Magazine decided to do a survey of 3G coverage across america.