如何使用批处理解决此问题（筛选程序）？

Question

我有一个名为file.txt的文本文件，其中包含

Combo: testing123mail@gmail.com:password
As Combo: 
abcdefghijklmnopqrstuvwxyz@gmail.com:ajfbdf
some text here
some more text here
As Combo: hadvsfhia@ahfjbadj.com:password@1
some random text here
iloveu@gmail.com:passypassyword123
goldenmammy@hotmail.com:youtube123

我正在运行以下代码，仅从上述文本文件mail:pass中过滤file.txt

for /f "tokens=3" %%a in ('type file.txt^|find "As Combo:"') do >>mail.txt echo %%a
for /f "tokens=2" %%b in ('type file.txt^|find "Combo:"') do >>mail.txt echo %%b
for /f "tokens=1" %%c in ('type file.txt^|find ":"') do >>mail.txt echo %%c

mail.txt中的预期输出，

abcdefghijklmnopqrstuvwxyz@gmail.com:ajfbdf
hadvsfhia@ahfjbadj.com:password@1
testing123mail@gmail.com:password
iloveu@gmail.com:passypassyword123
goldenmammy@hotmail.com:youtube123

但是，正在获得实际输出，

abcdefghijklmnopqrstuvwxyz@gmail.com:ajfbdf
hadvsfhia@ahfjbadj.com:password@1
testing123mail@gmail.com:password
Combo:
Combo:
Combo:
As
As
iloveu@gmail.com:passypassyword123
goldenmammy@hotmail.com:youtube123

注意：不同的文本文件中的邮件ID和密码会有所不同。例如，上面给出的邮件ID和密码是我随机输入的。