SuperMemo hangs up on mail from MAILER-DAEMON

Question

SuperMemo keeps hanging up on mail I try to import from one of my Outlook folders. After some investigation, I found that it is always hanging on an e-mail with the subject Subject: Mail delivery failed: returning message to sender

Hints

you will probably need to remove that mail from that folder and import it manually (if at all you need to import mail rejects)

Answer

SuperMemo will slow down substantially on long texts (e.g. XML attachments). If the rejected mail contains large files encoded in the mail of the body, SuperMemo will still treat them as text that needs to be processed. This way, a large picture rejected by the mailer, may come back encoded as a huge text file. This will indeed make an impression that SuperMemo hung up (it only displays an hourglass without a progress bar). If this is the case, let SuperMemo process the file (however long it takes) and preferrably delete that file from SuperMemo (it will slow the program down each time you enter the element and it will clog your collection with excess megabytes of data).