Alex, I won't begin to claim to know the root cause behind this, but "I own it" isn't a good reason to say that no spam has come from it, indeed it's not even a reason to say that a great amount of spam hasn't come from it. The only way Google allows contact on these issues is via this form: https://support.google.com/mail/contact/msgdelivery I also see that your domain is listed by http://www.squidblacklist.org/ http://mxtoolbox.com/SuperTool.aspx?action=blacklist%3acorp.nac.net&run=toolpage Clearly it's not just Google that sees some issues, but your domain doesn't appear to be on any other email black lists, which generally means that a machine(s) on your network is/was compromised and being used in a phishing attack. Scott Helms Vice President of Technology ZCorum (678) 507-5000 -------------------------------- http://twitter.com/kscotthelms -------------------------------- On Thu, Feb 12, 2015 at 10:54 AM, Alex Rubenstein <alex@corp.nac.net> wrote:
Mainly because I own it, and the people who use it. The server has been around 10+ years and has tight oversight. SPF is proper. This is a recent issue.
*From:* Scott Helms [mailto:khelms@zcorum.com] *Sent:* Thursday, February 12, 2015 10:51 AM *To:* Alex Rubenstein *Cc:* Josh Luthman; NANOG list *Subject:* Re: gmail spam help
I'd be interested to know how you can be so adamant about the lack of spam from this specific server. A great percentage of the spam hitting servers I have visibility into comes from very similar kinds of set ups because they tend to have little or no over sight in place.
Also, lots of commercial email gets flagged as spam by users, even when they opted in for the email. If enough people flagged email from this server as spam it will cause Google to consider other email from the same small server as likely to be spam as well. Small systems, especially new ones, tend to unintentionally look like spam sources by not having proper reverse records, making sure you have SPF set up for the domain, etc.
Scott Helms Vice President of Technology ZCorum (678) 507-5000 -------------------------------- http://twitter.com/kscotthelms --------------------------------
On Thu, Feb 12, 2015 at 10:41 AM, Alex Rubenstein <alex@corp.nac.net> wrote:
I should have been clearer.
I have been getting complaints from my sales folks that when they send emails to people who use gmail (either a gmail account or google apps) that they recipient is reporting that the email is ending up in the Spam folder. So, I tested this myself, sending an email from alex@corp.nac.net<mailto: alex@corp.nac.net> to rubenstein45@gmail.com<mailto:rubenstein45@gmail.com
[cid:image001.png@01D046AD.3B2FA890]
This is curious to me, since @corp.nac.net is a small exchange implementation with only about 50 users behind it, and there is no question that there is no spamming going on from here.
So, it’s not a question of adding a filter or not using gmail; it is not me who is using gmail in this problem.
From: Josh Luthman [mailto:josh@imaginenetworksllc.com] Sent: Thursday, February 12, 2015 9:32 AM To: Alex Rubenstein Cc: NANOG list Subject: Re: gmail spam help
Create a filter.
Josh Luthman Office: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Feb 12, 2015 8:11 AM, "Alex Rubenstein" <alex@corp.nac.net<mailto: alex@corp.nac.net>> wrote: Is there anyone on-list that can help me with a world -> gmail email issue, where email is being considering spam by gmail erroneously?
Thanks.