[otrs] Attachement Problem while sending mail

Hi, Mails with attachement other than word document is not coming to OTRS mailbox. mail with screenshot as attachements is not coming to OTRS.If he needs to send the screenshots ,he need to first copy it in word document and then attach the word document and should send.How can i solve this problem?Also mails containing data in table format is also dispalyed in awkward format.Can anyone help me in solving this problem.?