[ale] Fetchmail IMAP backup

[Alex Carver]

On 2017-01-03 16:05, Steve Litt wrote:

> I'm not sure how procmail can use an external command to decide
> something, but I bet it can, thereby accommodating your programming to
> look in spreadsheets and the like.

Set a variable with a pipe then select with that variable:

:0 W
VARNAME1=| command here with arguments

:0
* VARNAME1 ?? regex string
{
do your things here
}