Hello! You are most likely here because we have first "met" on eBay and I have given you the link to this blog post because you need my email address or I need yours. Mine is firstname.lastname@example.org and if you are curious as to why I had to ask you to come here, please read on.
eBay prohibits potential buyers and sellers from exchanging email addresses. In fact, their message system has filters which prevent the sending of any message containing an email address. If you try to disguise the address by typing things like "(at) a.o.l dot com" the filter will catch it and you will not be able to send the message.