VPOP3 supports wildcards in many places. These are similar to the * and ? wildcard characters using in DOS and Linux.
In VPOP3 a * matches zero or more of any character, and ? matches exactly any one character.
So, ca*er will match caterpillar, caper, caer, etc and ca?er will match caper, cater but not camper or caer.
In VPOP3, you can use multiple wildcards in one string, eg ca*er*ly will match caerphilly and caleraply and camdfewfqqwfergewgehasdly.
DOS wildcards don't always work well with multiple wildcards in one string.