I use E4ward for that purpose. E4ward allocates aliases, which look like
firstname.lastname@example.org. I give out these aliases, and E4ward forwards emails sent to them to my real email address, but with a tricked return address that I can use to respond such that my answer would seem to come from the alias.
The advantage in that kind of service is that I'm less exposed to spam, and when I do receive an unsolicited email I know exactly who is to blame.
I have tried a dozen such services before settling on E4ward as the best.
I used a free account for a couple of months, and was so satisfied that I paid the $10 yearly subscription.
Their service is very complete, missing only the feature of auto-expiring aliases, which I don't need.
Read this article for a description E4ward.com - Disposable Email Address Service:
E4ward.com is a down-to-earth and very
useful disposable email service that
makes it easy to prevent spam to your
real email address with easily
erasable aliases. You can use your own
domain with E4ward.com, but auto-expiring aliases
are not offered.
- E4ward.com lets you set up unlimited disposable email
- You can set up custom aliases or use random characters to make
guessing more difficult.
- Each E4ward.com can have a memo to help you remember which site or use
it was set up for.
- E4ward.com lets you create aliases for multiple real email addresses.
- You can use aliases at your own domain name with E4ward.com.
- E4ward.com protects your real address even in replies by routing
them through its servers.