Really stupid thoughts: remove any spaces in the filenames, if any exist (Yahoo! mail seemed to have troubles with spaces, mail/your isp may be different) You may want to try stuffing the files (or zipping them). Make sure excel files have .xls at the end, and word documents have .doc at the end. > Eudora's opened as doc files, while Mail's came through as generic > .dat files, with W98 asking how it should open them. Wordpad opened > the Eudora-sent files. > > Any ideas what Mail is doing, and where to go to change it, whatever > it is? I can get by using Mail to receive and take advantage of its > Spam technology, and send attachments from Eudora, but it's really a > PITA to do it that way. All help gleefully accepted.