mssusr9501's profile



1 Message

Tue, Aug 31, 2021 6:08 PM

Invsalid Server response when attempting to send email via xfinity smtp

For last several months have had trouble sending email through xfinity.

I use client eM Client

Incoming mail loads fine

Outbound mail is very spotty.

If I leave email client running, email is eventually sent, might take 4-8 hours before local outbox is cleared.

Have checked xfinity third party settings

Have confirmed client settings with xfinity instructions.

Successful immediate transmission is rare but does happen occasionally

Have seen numerous thread son this and have seen that Xfinity disavows any problems with SMTP servers.

today eM Client is reporting (removed my email address for security):

1:47:39 PM [Edited: "Personal Information"] [SMTP] MailClient.Accounts.ConnectionException: Invalid server reply when connecting: ' Too many sessions opened

Frustrating to know that eM Client settings are correct (email does get sent eventually) but I have to experience delays and leave my email client up and running to ensure outbound messages are sent.  Have had instances where it takes two days before client successfully connects to xfinity SMTP and sends message.

This began occurring late last year.  Up to that time, eM Client had performed admirably, Xfinity response time was quick, outbound messages sent within seconds.

Have had 2 eM CLient upgrades since this issue began occurring, no change to Xfinity performance with either (not that I would expect any)

I am confident this is an xfinity issue but have no idea how to troubleshoot further or how to escalate to achieve resolution.

Official Employee


274 Messages

2 m ago

Hello @mssusr9501. I am sorry to hear that you are having email issues and I would love to assist you with a resolution. Let's get your account pulled up and start getting this taken care of. Please send me a direct message with your first and last name, along with your complete service address to “Xfinity Support”. To do so, click on the chat icon located at the top right of this forums page.   

Here are detailed steps to direct message us:  

 • Click "Sign In" if necessary 

 • Click the direct message icon

 • Click the "New message" (pencil and paper) icon 

 • Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list 

 • Type your message in the text area near the bottom of the window 

 • Press Enter to send your message 

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