Our system has detected an unusual 550-5.7.28 rate of unsolicited mail originating
from your IP address. To 550-5.7.28 protect our users from spam, mail sent
from your IP address has been 550-5.7.28 blocked. Please visit 550-5.7.28
https://support.google.com/mail/?p=UnsolicitedIPError to review our 550
5.7.28 Bulk Email Senders Guidelines. h16si13481148wml.155 - gsmtp
How can I look into this? Has my server been hacked? Does this mean I have to change the ip of my box?
First, read this page;) Add your site to postmaster.google.com.
Second, look in your mail.log file and verify how much mail is sent to google
the mail.log file is in /var/log/
I’m not sure, but doing this grep, will probably give you some idea how much mail is sent to google recently
I like to install and watch pflogsumm as it will show you unusual activity. So if a mailbox gets compromised and sends spam, you will definitely notice it.
Verify with mxtoolbox if your ip, your miab domain or the sending domain is on a blacklist
I’m not blacklisted anywhere.
I like to install and watch pflogsumm as it will show you unusual activity. So if a mailbox gets compromised and sends spam, you will definitely notice it.
Nice tool. Doesn’t show any suspicious activity…
I had a problem with AT&T not accepting emails from MiaB and it was only dnsbl.info that was able to discover the blacklist I was on. The MX Lookup Tool at mxtoolbox.com did not find my IP address anywhere.