From: Gary Mort (gmlugsaplings.us)
Date: Sun Jul 01 2007 - 19:41:22 CDT

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Edgar Díaz Orellana wrote:
>
> Hi everyone.
>
> I have some sites hosted in this Server some of them have 2000 email
> accounts, then i try to make some load balance for outgoing email traffic
> because all the time, because the amount of email accounts i have in this
> Server, some mayor email hosting providers like Hotmail, gmail, yahoo and
> others, think i'm a spammer, then i think the best way to change this
> situation, is make a load balance on the outgoing email traffic, the thing
> is all outgoing traffic still goes by the eth0:222 and no balance is doing,
> and I really need the balance.
>

1) Your lacking a PTR record for the ip address sending email. For
example, 219.132.27.200 is your problem, it's coming up with a dynamic
PTR record and no valid A record:

Randomly checking the other IP addresses reveals the same.
No PTR records, dynamic address range, to them your a spammer. Fix it.

The root name servers for those addresses are timing out, so lookups are
depending on cache. Have those servers fixed.

2) Your A record for mx.gigahost.cl is mucked up. Instead of listing 4
mx records, your only listing 1 4 times. I'm assuming your doing round
robin DNS of some sort on them. However, since your SPF record does not
contain the IP addresses, if the IP address of your outgoing mail
attempt doesn't match the IP address the RECEIVING smtp server finds for
mx.gigahost.cl - your spam score goes up.

3) Your SPF record is broken. Your SPF record is:
"v=spf1 mx redirect=mx.gigahost.cl" which means that when verifying SPF
records, instead the record for mx.gigahost.cl is used. But there is no
such SPF record.

Fix the above, notify hotmail that your SPF record is fixed so they
refresh their cache, if your feeling like a little more work, add domain
key signatures to your outgoing email.

With all of that fixed, hotmail will STILL assume your a spammer for a
while because they base their decisions on HISTORICAL trends. Breaking
up your email from multiple ip addresses does nothing to fix that, that
takes time for them to build a history of your traffic pattern.

Sign up for AOL's feedback and nail any spammers using your servers when
you find out about them.

Sign up for hotmail's monitoring service.

Trying to fool others won't work and will just increase your spam score
when they determine your taking measures to work around their metrics
rather than acting responsibly.

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