Adjust existing perl script which converts emails to pdf

The existing script converts all emails to a certain receiver which contain attachments to pdf-files(which include the attachments). This is something that works but we also want to be able to convert all the emails to pdf's even if they don't have any attachments. I thought we could just bypass the check for attachments and that everything would work, but this does not seem to be the case. I get seem to get an error on a null value when using the result $msg{'parts'} (Can't use an undefined value as a HASH reference at [login to view URL] line 148, <GEN0> line 149.) I expect this won't be so hard if you know something about perl and the structure of mail messages. The current script is about 550 lines long and contains english comments and logging, this might help in understanding it faster.