02-01-2017 12:11 PM
RE: Invalid or expired SS certificate of att.yahoo.com:995
My Thunderbird email client pops up a notification of invalid or expired security certificate of att.yahoo email server. Pointed to server location: pop.att.yahoo.com:995
I view the error detail that says certificate expired on 12/02/2016
Do anyone know what happened? Should I permanently store this exception?
Solved by: Go to Solution.
02-01-2017 12:26 PM
02-01-2017 2:06 PM
For years I have not had any issues with my email setting on my phone using:
I have always used pop.att.yahoo.com
SSL turned on
port 587 and port 995
Now, I have errors popping up cannot verify server identity... certificate not trusted expires 12/9/16, 5:59 PM. Unable to verify SSL server.
Now, I can't use email on phone. This is my main source of using my email as I do not use a computer. Of course, I can log into email perfectly on a computer.
Of course, this e-mail was set up as I have had DSL with ATT for years.
Did Yahoo change email settings? Server settings? Change settings to where the above information is no longer exist?
I appreciate an answer to my problem.
Thanks in advance.
02-01-2017 2:39 PM
"Internet Security Warning" / "Security Certificate expired and cannot be verified" / "Issued to pop.att.yahoo.com / "Symantec Class 3 Secure Server CA – G4" / "valid 12/8/15 to 12/9/16" ?? / We check email daily and have not had a problem until now and get the same message on 2 different laptops with both using Windows 10 and Microsoft Office 365. I have checked the Clock on both computers and the current time and date are correct. I have checked with MS and they say it is not with their software; and all updates are up to date. I have also been using AVG for years and their Internet security is up to date.
02-01-2017 2:51 PM
02-01-2017 3:07 PM
I am having the same issue. It started today, February 1, at approximately 1:40 pm.
It is not an Outlook problem - it is strictly an ATT/Yahoo issue. Please fix this!
02-01-2017 3:48 PM
Unfortunately neither of these links have anything to do with an invalid SSL certificate. The problem appears to be on the pop.att.yahoo.com outbound server. Who is responsible for keeping the SSL certificate valid?
02-01-2017 3:54 PM
Hi Curious-cat, thanks for your tip and I "verified my email client server settings" as the link recommended and they are up to date.; So there must be another problem. Note, we have been using this server setting since 2014 with no issues till now. If you think of another idea please pass it along.
Verify your email client server settings
- edited 02-01-2017 4:07 PM
Me too. With Yahoo, I am not making an exception.
02-01-2017 4:19 PM
02-01-2017 5:05 PM
Yes, it does resolve the problem. You should no longer be using the pop.att.yahoo.com server; those settings are obsolete. Instead use the inbound.att.net and outbound.att.net servers per the instructions in the link.
02-01-2017 5:59 PM
Changing the settings (inbound and outbound) per the "u-verse" link did the trick for me. Thank you for sharing the links!