resomta-a2p-647974 Sending error

Hello,

I am needing assistance with getting this error resolved. This is the same exact issue as this post: https://forums.xfinity.com/conversations/email/421-resomtah1p028516syscomcastnet-excessive-failed-authentication-esmtp-server-temporarily-not-avai/6581ba29e4ada5345193b7c1

We have had our IT look at this and the xfinity/comcast servers are blocking me from sending from my email at the office. I have verified that all devices that have this email attached do not have invalid credentials. This started happening a month ago. Is there a way Xfinity can whitelist my public IP at the office?

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XfinityThomasA

Official Employee

•

1.8K Messages

22 days ago

user_dme59a - Thank you for your feedback and for joining us here on the Foums! Does this issue occur when sending emails via Xfinity Connect?

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user_dme59a

2 Messages

Hi Thomas! This does not happen via Webmail. It is only when sending through third party email clients. Outlook, Outlook Mobile, etc.

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17 days ago

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XfinityAirelle

Official Employee

•

2.1K Messages

user_dme59a We would like to look into this further for you. Can you initiate a direct message and start with your full name and address? To start a direct message, you must be signed in. Please click the "Direct Messaging" icon in the top right of the page next to the bell, and send your message to "Xfinity Support". Talk to you there!

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15 days ago

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user_dme59a

resomta-a2p-647974 Sending error

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