Hello -- our office recently had DSL installed. Ever since, we can't send attachments via e-mail on either Outlook Express or AOL. I get error message -3155 on OE (which I believe is an Open Transport error??). AOL just quits. The DSL providers (Mac unfriendly) have no answers. We can send e-mails without attachments and we can receive e-mails with attachments. Any suggestions as to what is amiss? (I am not technolgically adept so instructions assuming only a basic/intermediate knowledge would be much appreciated!)

Rather than look for incomprehensible solutions with no pictures or dialogue here, I would strongly advise that your boss hire a free-lance Mac troubleshooter (they tend to charge less than Apple) - and get your entire Mac network looked at. Mac OS 8.6 is getting pretty long in the tooth now, and you might need to upgrade to a higher OS - eg: Mac OS 9.2.2 - and it would be far less hassle for you if someone just came in and did it. So open that big old yellow book and let your fingers do the walking. cheers cw

You don't say what DSL provider you have, but I saw this on Macintouch recently: http://macintouch.com/isp.html#jul11 The whole report is probably worth a read. p

Christine, Outlook Express error messages are the next best thing to hyroglyphics. The only trace I can find is that error -3155 has something to do with the Router connecting your office computers to DSL. I think that the Router settings need to be altered. It is also quite possibly - as you say - an Open Transport error - though it may be a conglomerate of problems also involving the Network itself. This may sound really stupid, but try Trashing the "Apple CD Player" and all Extensions and Preferences relating to the Apple CD Player. Then restart your Mac and see if error -3155 appears again in Outlook Express. If (even momentarilly) it does not appear again, you have a clue ... or one piece of the puzzle. That's the best I can do for now. See advice in Response Number 1 again. cheers cw

Thanks very much for your assistance, clockwork & pickle. We're using Covad and the problem manifests in both Outlook Express and AOL. Unfortunately, hiring a tech person is just too civilized for my office. ;) I'll forward your suggestions to my boss and hope he can figure it out, because now even e-mails with more than a couple of sentences are not going through. So much for the exciting world of DSL! I'll post here if we discover the solution. Thanks again -- Christine