Problem sendig email

Discussion in 'ISPConfig 3 Priority Support' started by Alessandro, Jul 12, 2018.

  1. Alessandro

    Alessandro New Member

    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: 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

    I can receive emails, but when i send an email I have the following error

    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
  2. till

    till Super Moderator Staff Member ISPConfig Developer

    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.
  3. Alessandro

    Alessandro New Member

    I ask to my internet provider and they say that they make all the necessary config for having a mail server on that ip
  4. till

    till Super Moderator Staff Member ISPConfig Developer

    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.
  5. Alessandro

    Alessandro New Member

    You are right, it was a blacklist problem.
    Thank you

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