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Can´t send e-mails - authentication error

MarcoTeixeira

Hi, 

 

I'm configuring a XG 115 V.17 (has the lastest firmware). I created rules in firewall for each type of traffic. At this moment, only mail and http/s is allowed. 
I receive e-mail, but I can´t send (external e-mail servers). 

Outook gives an error: 

Receiving' reported error (0x800CCC1A) : 'Your server does not support the connection encryption type you have specified. Try changing the encryption method. Contact your mail server administrator or Internet service provider (ISP) for additional assistance.'

I thought it was something related with TLS/SSL, but even when I configure the mail client with SMPT, port 25, no authentication, it doesn´t work. 

The firewall rule for outgoing e-mail had the work web policy applied. I removed it, but the issue remained. 

Best regards



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  • 0 in reply to darnoK

    Hi. 

     

    I disabled rule nº 5, and it works, because business rule is configured. 

    If i accept the sophos certificate, I can send e-mails. 

    But I don´t want to install any certificate. I just want to send e-mail. 

    Something is filtering the e-mail and forcing it to use the XG certificate. 

    How do I disable that behavior ?


  • 0 in reply to MarcoTeixeira

    Hi, 

    I deleted all rules and created a new one, allowing all traffic in-out. 

    It's working smtp now. 

    There is something weird I don«t understand. 

     

    When i configure a firewall I like to be strict and granular in rules. 

    I created a rule permitting DNS in-out and http/s in/out. 

    I deleted the DNS rule because I found it suspicious that no traffic was on the DNS rule, and name resolution continued to work. 

    Maybe smtp was not working because I had a specific rule for it. Strange. 

     

     

     

  • 0 in reply to MarcoTeixeira


    If you do not want to see the certificate error message in Outlook, you need to edit the business rule and uncheck the IMAPS and POP3S scan.

  • 0 in reply to MarcoTeixeira

    Hi,

    The top rule of picture above is auto-created by Sophos when you use Email Protection feature in MTA mode. It will scan traffic SMTP/S and then if you generate SMTP traffic from client, it will be scaned and maybe break connect.