[pest79456]

I once used this email provider called bluebottle.com and now they don't do it for free and I don't know if they use the Reply feature (where someone sends you an email and it automaticly replys saying it it wont be sent till the sender conferms that its not a bot) and a way to bypass that using a code or frase set in the subject line.

[spot]

icmail.net is free and does that.

Quote from their filter setup page:

Exceptions allow you to setup filters to tell the mail server what to do with specific messages. This allows you to move messages into folders and forward to other email addresses, bypassing the spam blocking features Friends, spam hold, reject, and vanish for messages you are expecting.

You can form compound rules by using and and/or or. They are applied from left to right, there are no grouping operators. For example; (a and b or c) will be true when (a and b) or when (c), NOT, when (a) and (b or c)

You can choose to Accept*, Vanish*, or Reject* a message, or Request* a friends confirmation be sent to confirm the sender is a person and not a spam robot.

* Accept means receive the message.
* Reject do not accept the message, their server will notify them that you didn't get it.
* Vanish means throw the message away.
* Request means send friends request to the sender. (won't apply to existing friend)