For a specific sender domain, I need to change the max. recipients per message, so I created a new sender group containing the domain (example.com) and a new mail flow policy where I changed the default setting (100 recipients) to 1000 recipients, but is not working.
When I track an email, is not using my new policy, is just using the default one (ALL - ACCEPTED).
Thanks in advance for your help.
Take a look at tracking log for those messages, and see where the messages are actually coming from.
You probably want to try ".example.com"
But if they are using a mailing service (Emma/Constant Contact), or O365 the domain on the sending may not match the From Address. In that case you'll need where its actually coming from in your sender group.
Thanks guys for your answers. The mails are comming from Office 365 (.outbound.protection.outlook.com) but if I add that domain I will permit 1000 destinations for every client using Office 365.
Is there a workaround?
You could test using the Rate Limit for Envelope Senders 'Exceptions' list. (screenshot below)
You will still need to setup a custom Sender Group and Mail Flow Policy for this sender (.outbound.protection.outlook.com), but you can set a lower rate limit and then set the exception for your specific sender so they're not limited.
Hope that helps!
Good answer! I just configured what you explained but I have another question: if I set the exception to ignore rate limit for address @example.com, the rate will be unlimited? or is defined somewhere else? I'm using 100 (instead of 1000) recipients for the Sender Group/MailFlow defined for Office365 and ignoring the rate for the specific domain.
Thanks in advance,
The rate-limiting will then be ignored for that sender at the mail flow policy level and whatever global hard limits are set at the listener level will be applied. (As Ken also stated)
Hope that helps.
We have few vendors that send fairly decent volumes of email to us (they use office 365 and amazon). Their senders envelope doesn't matcht IP or rDNS. I whitelisted few IPs in HAT but their pool is fairly big so I was also looking into limiting outlook.com but allowing certain sender envelopes to come at higher mps.
So as far as I understand I can create sender group and put outlook.com there and assigned somewhat restricted policy but inside that policy add Addresses list to exclude envelope senders listed there from low mps which will make it unlimited to them (outside of the hard cap of listener) and low mps for outlook.com
I'm I understanding that correctly?
To add to what Ken has stated ...The HAT/Sender Group portion of the ESA works off of the sending server IP/hostname, and not off of the Mail-From domain. You'll want to check the first line of the incoming connection via Message Tracking or mail_logs and use the 'sender IP' X.X.X.X and/or 'host' FQDN, and add those to the HAT/Sender Group list of senders.
You can also use partial/wildcard hostnames. For example, if the sending server was smtp1.cisco.com, you could add .cisco.com as the sender.