SMTP outbound emails being block/marked SPAM

@XfinityBrianH​ Thank you Brian!  Yes, I have.  In fact, in desperation I even installed the current preview version in hopes that it might help, but it did not.

In case it helps you, here is a message from Xfinity that results when attempts to send messages occurs:

resomta-a2p-647652.sys.comcast.net resomta-a2p-647652.sys.comcast.net Comcast block for spam.

In the past, there have been postings here about how it was that Xfinity has tightened its authentication processes such that the appended dot on the server name my Outlook is presenting, causes these issues.  I'm doing everything I can on my side to try and stop Outlook from doing this but so far nothing has worked.  Can Xfinity perhaps grant my IP some grace to allow me to continue to use SMTP?

Thank you,

Jonathan 

@user_fdd4y1  Can you please send us a DM. You can start by clicking the chat icon located in the top right corner of your forums' page when signed in. Once there, you can direct your messages to "Xfinity Support." Please add your full name and service address to help us locate your account. Let me know if you have any questions. 

Thank you Brian.  I did open the chat box and type a message in.  I did not see an opportunity to direct it to "Xfinity Support".

Nice to meet you Brian, and thanks for reaching out. I wouldn't be able to change anything to allow the use of SMTP. Have you configured outlook the way suggested on our site to see if it can assist you with getting the email issue corrected? 

@XfinityEricB​ Hello Eric.  Yes, I'm using port 995 for POP3 and 465 & TLS for SMTP.  Have been for many years.  Nothing changed on my end except for how Outlook attempts to log into pop3.comcast.net.  It's adding a dot to the end of the name and your server authentication processes don't like that and are punishing me by blocking my access to SMTP.