On Fri, 2 May 2014, Todd Lyons wrote:
>> Twice from the same IP address every 10 minutes non-stop, then again
>> from another IP address in the range 213.199.154.xxx
>>
>> 2014-05-02 00:12:07 H=mail-db3lp0077.outbound.protection.outlook.com
>> (emea01-db3-obe.outbound.protection.outlook.com) [213.199.154.77]:43163
>> I=[95.172.15.115]:25 rejected EHLO or HELO
>> emea01-db3-obe.outbound.protection.outlook.com: [2B02] Rejected. Not
>> identical. IP host = mail-db3lp0077.outbound.protection.outlook.com;
>> HELO = emea01-db3-obe.outbound.protection.outlook.com
>
> If you're going to require that rdns and forward dns are identical,
> you're going to have lots of issues with receiving mail from large
> systems.
>
This isn't even that - he's requiring that HELO and rDNS are identical.
I personally would not do this, but it might be ok for a hobbyist site.
That said, checking that they are both in the same domain is useful.
--
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Dave Lugo dlugo@??? LC Unit #260 TINLC
Have you hugged your firewall today? No spam, thanks.
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Are you the police? . . . . No ma'am, we're sysadmins.
