<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif; "><div>I know this is an old topic but I wanted to follow-up because I was running into the same issue and have found a solution that appears to work for me on Ubuntu 10.10.</div><div><br></div><div>To summarize the problem, when ZendTo sends an automated message the Return-Path becomes www-data@domain.com instead of the email address you specified in the ZendTo configuration. According to what I gathered from the thread, sendmail overrides any changes to the configuration of NSSDropbox.php. I am not sure if this is a valid fix for most people but I was able to fix the problem by adding the following to the bottom of my PHP.ini file:</div><div><br></div><div>sendmail_path =/usr/sbin/sendmail -t -i –f user@domain.com (substituting your email address of course)</div><div><br></div><div>This still mens you have to manually modify a file, but at least you are not digging around your sendmail configuration files. As usual, your results may differ but I wanted to add this to the discussion in case it is useful for someone else.</div><div><br></div><div>- Craig</div></body></html>