I have an OTRS set up where it’s been working perfectly fine in a production environment for 18 months now, grabbing emails from a pop3 account. All of the sudden today, emails stopped coming in. I checked the pop3 account using a webmail client, and it shows emails in it. When I go to fetchmail in the admin section, it spends a second running, and then my browser pops up a download for a 0 byte index.pl file. It creates a new ticket for the first email in line only; also in this case, the email is an HTML file, and it spits it out as text-only in the ticket (where it used to preserve it as html), and won’t delete that email, or any others. System logs state that it complains “Can't create PID PostMasterMailbox, because it's already running (otrs.office.emediatrade/1396)!”. I’ve found people online with similar problems, and they stated to go into mysql, and run “ select * from process_id where process_name = 'PostMasterMailbox'; delete from process_id where process_name = 'PostMasterMailbox';”, and then run /opt/otrs/bin/otrs.PostMasterMailbox.pl –f 1. When I do this, it clears out the entry in mysql as expected, but when I run the pl script, it says [root@otrs log]# /opt/otrs/bin/otrs.PostMasterMailbox.pl -f 1 POP3: Message 1/13 (emtsupport@emediatrade.com/mail.ex1.secureserver.net) Couldn't send mail: 550 5.7.1 Client does not have permissions to send as this sender at /opt/otrs/Kernel/System/Email/SMTPTLS.pm line 172 An entry is created again in mysql, the logs say that it can’t create a PID, because it’s already running, and ps –ef | grep PostMasterMailbox.pl turns up nothing. If I go into the UI, and create an email ticket to myself, it successfully sends it to my inbox. I’ve tried rebooting the server, but no avail. I’m at a loss, because no email settings changes have occurred for months. Please help?? Thanks, --Mark