Visitor
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4 Messages
Outlook can not verify STMP cirt
I am replacing my wife’s PC with a new windows 11pro PC with a local logon. I loaded Microsoft office/outlook from my Microsoft account. Set it up for her existing email account. Pop/Smtp. Works sending and receiving email with one small exception. Each time I open outlook and attempt to send email I get the following popup.
“Internet Security Warning. The server you are connected to is using a security certificate that cannot be verified. Target principal name is incorrect. SMTP.Comcast.Net Do you want to continue using server.” I check yes and it works until the next time I start Outlook, and I must do it again.
XfinityAlfonso
Official Employee
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1.8K Messages
1 year ago
Hey there Stan7777 this error occurs when Microsoft perceives that the server name doesn't match. This is not a critical error, but it will likely keep appearing. As long as your server settings reflect the following you are A-OK.
- Incoming Mail Server Name: imap.comcast.net
- Incoming Mail Server Port Number: 993 with SSL ON
-If the Mail Client lets you select an authentication method, choose STARTTLS.
-If Needed: 143 with SSL ON
-Outgoing Mail Server Name: smtp.comcast.net
-Outgoing Mail Server Port Number: 587 (SMTP)
-If Needed: 465 (SMTPS)
-Encryption: TLS (use SSL if TLS isn't shown.)
-Authentication: Type in your Comcast.net email address
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user_g27j35
Regular Visitor
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5 Messages
1 year ago
I have the exact same problem with a new Windows 11 PC. I have Office 365, and I'm using Outlook Classic because I heavily depend on pst files. The default Outlook installation was "New Outlook" which doesn't support psts, but I was able to do a new installation of Outlook Classic from the Microsoft site. I'm using POP3 with mail.comcast.net port 995 with SSL as the incoming server and SMTP.comcast.net port 465 with SSL as the outgoing server. The warning doesn't say which is the problem, but it says the certificate was issued to imap.email.comcast.net. I have the same mail setup on three Windows 10 PCs that have had Outlook 365 installed on them for a while, and they don't have the problem so far.
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