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Outlook : Sent test email message : The server responded : 550 Administrative prohibition (SMTP 465)

 Hi guys, im so sorry im new to this but i got my new setup for outlook but i cant use it due to my sophos utm 9 firewall block it

i tried to create Firewall rule and NAT masquerading and NAT rule but still not working maybe my setup is wrong.. anyone could help me to solve this issue..

 

HERE'S THE OUTLOOK SETTING:

Incoming Mail Server: mail72.extendcp.co.uk (79.170.44.72)

POP3 port: 995 / IMAP:993

Outgoing Mail Server: mail72.extendcp.co.uk (79.170.44.72)

SMTP port: 465

Secure Sockets Layer (SSL): On 

Also use Password for Authentication method

 

Thank you!



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Parents
  • Hi Jojie and welcome to the UTM Community!

    The lines in the Intrusion Prevention log are not related to the issue that led you to start this thread.

    If you're using either the POP3 or SMTP Proxy, please show pictures of the Edits of the relevant configuration.  Also, pictures of the Edits of your Firewall and NAT rules.

    "Also use Password for Authentication method" - which password, for what and where?

    Cheers - Bob

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Firewall Rule:

    Masquerading:

    Outlook Setup (From our Email Provider):

    Incoming Mail Server: mail72.extendcp.co.uk (79.170.44.72)

    POP3 port: 995 / IMAP:993

    Outgoing Mail Server: mail72.extendcp.co.uk (79.170.44.72)

    SMTP port: 465

      

    and Here's the Error:

     

    Im not sure to this one:

     

    Did i miss something..? Thank you!

Reply
  • Firewall Rule:

    Masquerading:

    Outlook Setup (From our Email Provider):

    Incoming Mail Server: mail72.extendcp.co.uk (79.170.44.72)

    POP3 port: 995 / IMAP:993

    Outgoing Mail Server: mail72.extendcp.co.uk (79.170.44.72)

    SMTP port: 465

      

    and Here's the Error:

     

    Im not sure to this one:

     

    Did i miss something..? Thank you!

Children
  • I bet Doug's answer is what you needed.  Your NAT and firewall rules should do what you need, but they include things you don't need.  Since you have "Any" in the firewall rule, including those other Services is redundant.  Because you have the Masquerading and firewall rules, the SNAT is redundant and should be deleted.

    Cheers - Bob
    PS Moving this to the Network Protection forum since neither the SMTP or POP3 proxies is in use.

     
    Sophos UTM Community Moderator
    Sophos Certified Architect - UTM
    Sophos Certified Engineer - XG
    Gold Solution Partner since 2005
    MediaSoft, Inc. USA
  • Hi honestly i also noticed that but thank you so much for this info, by the way the real cause of this issue is our Public IP address

     

    It is blacklisted and we found out using MXtool

     

    Thank you everyone!