Hello,
we are a small MSP in Spain and are changing out customer from our Shared CES platform to dedicated CES. One customer we configured last week and now we have some issues sending emails. They have Office 365 and we createt Outbound rule to send all emails to the CES which works fine beside of like 4-5 problems with customers:
Problem 1: Sending to customers with messagelabs
we have 2 customers ferrovial.com and acciona.com who cant receive emails from us. Ferrovial.com told us that friday morning they received some emails and later on it stopped working again. I attach some detailled information from the message tracking. Talking to our technicians they told us to:
>To change the max. connections, Mail Policies-》Destination Controls con Concurrent connections = 10 Maximum Messages per Connection = 10
>we checked the SPF and it seems OK v=spf1 exists:%{i}.spf.hc605-9.eu.iphmx.com include:spf.protection.outlook.com -all
I tried sending an email (to a non existing email account) to them from our our CES and got this repond (attached).
From our side everything seems OK, I dont understant why we dont gat any failure message and why and which system from them is not passing the emails to theirs email server.
Problem 2: Sending to notariado.org > You are not allowed to connect.'
That is another customer which should give any problems but in Delivery Status I get this failure:
Last 5XX Error:
554 5.7.1 You are not allowed to connect. (at 06 Feb 2021 17:04:16 (GMT +00:00)) IP: 193.16.43.215 |
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For any ideas and tips we are more than thankful....regards,
Roland
