[Alex3917]

You can also just add +domain to the local-part of your email address and do that without needing a disposable email service. Theoretically some sites may strip them out, but I doubt that many go to the trouble.

[ersii]

Please do note that there's quite a few services that do not recognize '+' as a valid character for who knows reasons. I don't know why though.

[bobcattr]

That only works with gmail.

[rbolkey]

It does work on gmail, but is definitely not gmail specific. Used to do that trick on my college email account.

[michaelhoffman]

It works for many mail servers, including Gmail.

[Firehed]

Also any Google Apps servers. Seems like a lot of extra work to look up a domain's MX records to figure out if it's safe to strip anything after + from their email address, which will only serve to annoy your users anyway.

[bobcattr]

which others? doesn't do it on sendmail or postfix