The transport encoding of this part: normally, you do not need to change this, since %1 will use a decent default encoding, depending on the MIME type; yet, sometimes, you can significantly reduce the size of the resulting message, e. g. if a PostScript file does not contain binary data, but consists of pure text -- in this case, choosing "quoted-printable" over the default "base64" will save up to 25% in resulting message size.
De transportkodearring foar dit taheaksel. Yn it algemien hoege jo dit net te wizigjen, oansjoen% 1 in kreaze standertkodearring brûkt, basearre op it mime triemtype. Mar soms kinne jo de grutte fan it úteinlike berjocht noch goed ferlytsje. Bygelyks as PostSkript- triem gjin binêre data befettet, mar allinne suver út tekst bestiet. Yn dat gefal besparje jo oant 25% op de triemgrutte troch de standertkodearring "base64" te ferfangen troch "quoted- printable".