Can’t send outgoing email

Hello @user_qs88o5, I hope you are having a great day. I understand you are having issues with your Xfinity email when trying to send an email. I can understand how frustrating that can be when you need to get a message to someone immediately. I do apologize for the inconvenience. When you are having issues sending an email, are you using the Xfinity site or are you using a third-party email client to send your emails? 

@XfinityMarshante​ I'm using Thunderbird.  I've had the issue before, it seems the last time I had this problem, I had been flagged as a spammer or similar- but I send very few emails.  The issue is intermittent; I sent an email fine from Thunderbird the other day.

I can pretty reliably receive emails. Responding to them and creating new emails will not send.

Hey @user_i925al, Thank you for visiting our official Xfinity Forums Community support page. We greatly appreciate you taking the time to share your experience regarding the Xfinity Email service. I would be more than happy to offer my assistance looking into this further for you. 

As a first step, are you able to log in to your Xfinity Email through our Xfinity Connect online web portal? If so, can you create a new email and send it to yourself to ensure the email is in the Sent folder as well as the Inbox.

If the email is able to be successfully sent an received, would you be able to fully delete your email profile within Thunderbird and create a new profile? We do recommend not editing the profile and completely removing and starting a new profile to ensure no other settings may be causing issues. The port settings can be found by visiting our 'Set up your Xfinity Email address with an email program' support page. 

Please give this a try and let us know what you find. We hope to hear from you soon.