Sendmail: messages being blocked by atmailcloud.com - "stat=Deferred"
Linux - ServerThis forum is for the discussion of Linux Software used in a server related context.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
The common factor is that they all use mx-20.au-east.atmailcloud.com. Eventually I'm notified that the messages have not been delivered.
If I connect to mx-20.au-east.atmailcloud.com
Quote:
$ telnet mx-20.au-east.atmailcloud.com 25
Trying 3.106.43.229...
Connected to mx-20.au-east.atmailcloud.com.
Escape character is '^]'.
451-conn-401: IP [XXX.XXX.XX.XX] is listed on Cloudmark CSI Suspect - is
451 currently being throttled
We are a small business, and don't send bulk email. There's no evidence that we harbour a robot that is sending out spam messages.
I have tried to de-list my IP address from Cloudmark, but their web page says I'm not listed.
Is there any way I can resolve this using my Sendmail config - I assume if the connection is throttled, it might still be possible to make a connection.
My sendmail config:
I've managed to use my ISP's smarthost (found on a forum). I'm not sure how long that will be supported. It took me a long time to work out the correct SPF record. Otherwise I can use another server that I run. I'm hoping that eventually the problem with atmailcloud will eventually go away . . .
Of course I was trying from a server that I know isn't on any RBL blacklist and isn't from a residential IP address, it also has fully functional forward and reverse lookups.
The OP has my sympathies as I've had several times where it's been difficult to get an IP off an RBL.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.