prefix characters

基本解釋

When grouping by prefix characters, you must set the Interval to an integer.
當(dāng)以前綴字符分組時，您必須將“間隔”設(shè)置為整數(shù)。
The combined length of message plus prefix can be at most 254 characters. The prefix must not contain a tab character.
發(fā)送消息的長度（包括前綴）最長是254個字符。前綴不能包含任何制表符。
If the names are too long, buy a shorter one. (I once bought xom.nu so my package prefix was only six characters long.)
如果名稱太長就買個短些的（我曾經(jīng)買到了 xom.nu 這樣一個域名，因而我的包前綴就只有 6 個字符）。