Re: [exim] HELO retries?

Graeme Fowler wrote:
> On Thu, 2008-03-27 at 12:27 -0700, Marc Perkel wrote:
>
>> I'm seeing something interesting. In the HELO acl if I issue a DENY I'm
>> seeing servers doing a retry of the HELO. Is this normal?
>>
>
> Yes, perfectly. It's termed a "woodpecker". There are multiple records
> of badly written mail applications hammering away for days until the
> message times out.
>
> Better to reject after RCPT or DATA for some applications, as they then
> go away permanently.
>
> Graeme
>
>
>

Most of what I'm seeing are spammers. Is there legit email that does
this? Or is this just viruses?