Possible forgery. Supposed receiving system not associated with any of your mailhosts
This doesn't happen all the time, just on some emails. So, I decided to redo my mailhosts for some of my alternate SC accounts. I did Hushmail, and it seems to have added more hosts now, so that may have been one of the problems (since the error above occurs often on manually reported Hushmail UCEs). But, I also noticed something strange on Gmail. I selected all the servers, which were 5 in total, to send test emails to Gmail. I followed the directions exactly and copied and pasted the entire plaintext of email into the mailhost box. I went and looked at my hosts for Gmail after the first email, but then after the 2nd, 3rd, and so forth, they were all different from the first. Is this common?
I don't have a screenshot or example of what I'm talking about (since I didn't expect that effect while I was in the process), so I don't recall which servers it identified as mailhosts for Gmail. But now, it lists the following:
- mxes.net
- mx.gmail.com
- aspmx5.googlemail.com
- mx.google.com
- google.com
- gmail.com
QUOTE
Sent test email to xxxxxxx[at]gmail.com through alt1.gmail-smtp-in.l.google.com.
Sent test email to xxxxxxx[at]gmail.com through gsmtp183.google.com.
Sent test email to xxxxxxx[at]gmail.com through gmail-smtp-in.l.google.com.
Sent test email to xxxxxxx[at]gmail.com through alt2.gmail-smtp-in.l.google.com.
Sent test email to xxxxxxx[at]gmail.com through gsmtp163.google.com.
SpamCop has just sent you 5 test messages to jongrose[at]gmail.com.
Sent test email to xxxxxxx[at]gmail.com through gsmtp183.google.com.
Sent test email to xxxxxxx[at]gmail.com through gmail-smtp-in.l.google.com.
Sent test email to xxxxxxx[at]gmail.com through alt2.gmail-smtp-in.l.google.com.
Sent test email to xxxxxxx[at]gmail.com through gsmtp163.google.com.
SpamCop has just sent you 5 test messages to jongrose[at]gmail.com.
I don't know if those servers are specific per account or location of being accessed or what. If they are, a mod can delete them. I also have saved the test emails sent to me if anyone would like to examine them.
Then, I was looking over my SC mailhosts and noticed a few strange entries. For example, I see listed as one of my mailhosts in SC xts.no-ip.org. I don't recall ever seeing that as a receiving server. Should I redo my SC mailhosts too?
So, in summary, my questions are as follows:
- How often should you reconfigure your mailhosts?
- How should you know when it's time to reconfigure your mailhosts?
- Is there any way to test for abnormalities in your mailhost configuration or know what to expect when looking at your mailhosts (ie: should you run a check for MX servers for the mail domain or something to see if they match?)?
jongrose
