Universal E-Mail-Adresse confirmation. E-Mail-Adresse anyone on the Internet and know if it was read. If an E-Mail-Adresse is not opened within a specified time the sender gets a warning notification. The process is invisible to the receiver and is unobtrusive. Easy to use, no learning curve. Reports are available on-line showing: - Undelivered mail only- or - All emails sent sorted by Datum or by recipient . Independent of receiver's mail reading software or IP provider. E-Mail-Adresse thus becomes a reliable means of sending correspondence.