Sending Logs From Router

... Here are the settings I currently have ...

You also need SSL/TLS or STARTTLS encryption. See https://www.xfinity.com/support/articles/email-client-programs-with-xfinity-email. Does your router allow you to configure those?

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Hello @09KR0058, and thank you for posting to the Xfinity Community Forum to get help. I wanted to see if you were able to get help from the link provided above? 

Hello, sorry for the delay in responding.

I'm just now getting back to looking at this issue.

The problem is that with my Netgear R7000 Nighthawk AC1900 router, there does not appear to be any way to declare any encryption method, which is why I was asking if anyone got this to work with Comcast

... there does not appear to be any way to declare any encryption method ...

Nope. My antique WNR1000v4 doesn't have one either, so if I want to send email from my router I have to set up an email server on the local network just for that purpose. That works, but it's kinda gross overkill unless you really, really want that info. If you could find a public server that doesn't require encryption that would work too, but my guess is that those are nearly extinct.

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Thanks for the info @BruceW, but I wouldn't necessarily expect an "antique" router to support this type of encryption.  The R7000 hasn't been out very long and has been getting pretty regular firmware updates.  I also ran across this post in the Netgear forums from late last year:

The smart email sender software on the Netgear routers in place is able to deal with plain text SMTP submission, with explicit TLS (configure port 587, this is the de-facto standard SMTP submission port, working with plain text), or with implicit TLS (configure port 465). Trouble is that if you don't specify the port, it defaults to 25 which is not intended for email submission (only for SMTP transport between message handlers). And that port 25 can be captured or is even blocked by more and more ISPs these days. 

However, I've tried it with port 587, then 465 and  neither of those work.

As for setting up an smtp server, that's a very interesting approach.  Would you mind providing more details on how you did that?  I've been in Development for 40+ years and love playing with things like that.

I've used Blat for a long, long time in projects that need to send email, but I don't see how it could be called by the email process in the router.

Correction:: my router is so old it doesn't allow me to specify what port to use. So even if the reasonable sounding statement you quoted is correct, I wouldn't be able to use it. (I need a new router.)

... smtp server ... Would you mind providing more details on how you did that? ...

Sure. I used the free version of Mail Enable, which seemed to me to be a bit more trustworthy than some of the other mail servers out there. My notes say:

1. Check router's Security / E-mail / "Turn E-mail Notification On" box.
2. Set "Your Outgoing Mail Server" to the local IP of the machine running Mail Enable
3. Enable the "MailEnable SMTP Connector" service.  

Received emails are stored at:

  C:\Program Files\Mail Enable\Queues\SMTP\Inbound\Messages\*.MAI

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... It is finally working with port 465 ...

Thanks for posting your results. Glad it's working for you!