1. A computer-implemented method for the transfer of data contained in an electronic message, in particular a MIME attachment, to a relational database comprising: utilizing a computer to perform: a. providing a plurality of predefined SQL templates, wherein each predefined SQL template comprises a SQL statement and at least one parameter; b. providing an XML sequence, which determines how the data is to be processed, wherein the XML sequence is an XML file comprising at least one XML statement corresponding to at least one of the plurality of predefined SQL templates; c. executing a sequencer, which is a computer program comprising executable code, wherein said executing the sequencer comprises the steps of loading the message, loading the XML sequence, and executing the XML sequence, wherein said executing the XML sequence by the sequencer comprises: loading the at least one predefined SQL template; using the data derived from the message as parameter values of the SQL template to provide at least one executable SQL statement; and executing the at least one SQL statement for accessing the relational database.