Weird to: addresses

[Matt Kettler]

Ugo Bellavance wrote:
> Hi,
> 
> We are receiving a lot of messages for invalid, weird addresses,
> containing spaces and numbers, like this one:
> 
>  Milter: to=< 3 mcfarlandmcfarlandju at cmq.qc.ca>, reject=553 5.1.3
> invalid local part
> 
> Anyone got these?
> 

Self-correction. I've only been getting the space/number bit since Sep 24
13:45:26 (EST).

It generally seems to be of the format < 3 validuser at evitechnology.com>

ie:

Milter: to=< 3 mkettler at evi-inc.com>, reject=451 4.7.1 Greylisting in action