I got spam mails from 53.com...

on 10-01-2007 21:16 Kevin wrote:
> [EMAIL PROTECTED] wrote:
>> On 10 Jan 2007 at 13:23, Ernesto Nieto wrote:
>>
>>> When I go look in the maillog file, this is the corresponding log entry:
>>>
>>> Sender: Invalid HELO Format 'mailgw5.53.com' RE_E_mail_problems_
>>>
>>> Now, I'm not up to snuff on the format, but isn't that legit?  Is there
>>> somewhere else I need to look?
>> Looks OK to me.  What do you have in your validFormatHeloRE ?
>>
> 
> Domain names must start with a letter and not a number, "53.com" is NOT 
> a valid domain name according to the RFCs (rfc1035 to be exact), however 
> these are not followed to the letter all the time and thus we get names 
> like that which violate that rule.
> 
> I'm not sure but the reg-ex string we use might follow the RFC exactly 
> and consider it invalid for that reason.
> 
> Kevin
> 
> 
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