Thanks Marc and Magnus !
It works perfect.
> Torsten Mueller wrote:
>> - the first chars of the local_part should be numeric.
>> - the length of the numeric chars should be at least 8
>> - last chars of local_part should be '-robot'
For the records:
deny message = Please use your mobile number i.e.
49179123456781-robot@??? \n\
where 49179123456781 is your mobile number
condition = ${if !match{$local_part}{\N^[0-9]{8,}-robot$\N}{1}{0}}
domains=test.archesoft.de