To unblock an email address in Gmail from a filter, remove that email address from the filter you made to set up the block.

Unblock Someone on Gmail (Mobile) Dismally, the Gmail app doesn’t feature a dedicated option to unblock an email address. Fortunately, the desktop version’s search method works wonders.

How to Unblock a Sender in Outlook 2007. When you add an email address to the blocked senders list in Outlook, messages you receive from that address automatically land in your Junk Mail folder.

How Can I Unblock an Attachment That Is Sent to Me So That I Can Forward It on Hotmail?. Hotmail is a free MSN service that allows you to send and receive entire files as email attachments ...