User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0 Build ID: 20150525141253 Steps to reproduce: It is suggestion, not a bug. When I create filter based on sender (for example), i fill text field with: padre-dev@perlide.org but what if I need some widecharacter? Actual results: wide/blank characters arent supported Expected results: currently i use multiple addresses like: padre-dev@perlide.org padre-adm@perlide.org etc. I want use the same with wide characters. example for bash: padre-*@perlide.org example for pcre type regex: ^padre-[^@]+?@perlide.org$ for recognition how text should be parsed, i suggest add some prefix: padre-dev@perlide.org #plain without prefix sh:padre-???*@perlide.org #unix shell expansion type pcre:^padre-[^@]+?@perlide\.org$ #perl regullar expression (pcre) expansion type regexp:^padre-..*@perlide.org$ #eventually can be supported posix regexp type

Until it is implemented in core TB, you can use the filtraquilla extension at https://addons.mozilla.org/en-US/thunderbird/addon/filtaquilla/ .