MailWasher recommends itself as an anti-spam solution. Accepting most of the general e-mail servers now in use, this client brings under a modern UI some basic features, such as the possibility to delete unwanted e-mails before downloading them to the computer, to check the sender and preview the content and to block spams thanks to some special filters and to an address recognizer.
Accidentally deleted mails are easily restorable from the Recycle Bin. In terms of speed, developers take pride in a download rate of 25 messages per second.
As for the way it notifies you, one gets to choose between sound and visual alerts.