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 <a...@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:khe...@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 <a...@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 a...@corp.nac.net<mailto: > a...@corp.nac.net> to rubenstei...@gmail.com<mailto:rubenstei...@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:j...@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" <a...@corp.nac.net<mailto: > a...@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. > > >