Hi, I have an error 550-5.7.1 sendig email. This is my setup: ISPConfig LAN IP: a.b.c.48 ISPConfig added LAN IP: a.c.d.44 Site: test.com on IP a.b.c.44 Firewall LAN IP: a.b.c.251 Firewall WAN IP: x.y.z.165 Alias WAN IP on Firewall for the site: x.y.z.186 NAT/Firewall rules for connection on wan alias ip x.y.z.186: port 25, 80, 443, 465, 587, 993, 995 -> a.b.c.44 My ISP make the reverse DNS config for IP x.y.z.186 GoDaddy Configuration: A @ x.y.z.186 CNAME smtp @ MX x.y.z.186 smtp.test.com I can receive emails, but when i send an email I have the following error Code: Diagnostic-Code: smtp; 550-5.7.1 [x.y.z.165] The IP you're using to send mail is not authorized 550-5.7.1 to send email directly to our servers. Please use the SMTP relay at 550-5.7.1 your service provider instead. The ip on error message is the firewall wan main IP Where is my error? Thank you
The error message you posted already explains the error, so I'll try to rephrase it: You try to send directly from an IP which is not allowed to be used for an email server. You can either ask the internet access or data center provider which assigned you this IP to allow emails ending from this IP or you use a relay server or email relay service to send emails trough. Relay servers can be configured in ISPConfig under System > server config > mail.
I ask to my internet provider and they say that they make all the necessary config for having a mail server on that ip
Then you should let them check that again and send them the error message you posted. If the IP would allow sending, then you won't get that message back from the recipient. Or you have to wait some time until the IP got delisted from whatever blacklist it is on now. you might also want to check your external IP on some MX blacklist check websites to ensure that it is not listed as dialup IP or similar.
