Exchange 2019 SMTP Receive Connector
Hi Tech, We have Exchange 2019, SMTP Open Relay Receive Connector. We have around 300+ services using this connector. Recently We engaged a few customers and performed exercise to send email with Authentication. My question here is, How we can find which smtp connection/IP is relaying emails using authentication and which connection/IP is relaying email anonymously/without authentication. I tried finding authentication tags in smtp receive connector's logging without any success. Any idea or direction to achieve this? Thank in Advance.
SMTP relay - Client host rejected: AP0002
Hello everyone, We have to send emails to a Bouyges address (a french telecom company) and I got this back: Sorry, no SMTP connection got far enough; most progress: RCPT TO response; remote host said: 554 5.7.1 <...dsl.sta.abo.bbox.fr>: Client host rejected: AP0002 Please use your ISP mailserver. (#5.5.0) I searched on Google to find a way to send the emails and what I understand is that I have to configure the SMTP relay of Bouyges. What I found are only configurations for postfix and I don't know how to configure it on an Exchange On-premise server, do you have any info? The SMTP server of Bouyges is smtp.bbox.fr What I don't know if it's possible to do is to use this relay only for the bbox mails address. Thanks for any help!