Can send but not receive on rcn.com email accounts after update from v68 to v78
Thunderbird stopped receiving all rcn.com emails after update. All gmail and other server accounts work fine. All settings are unchanged after update: server - pop.erols.com port: 995 security: SSL authentication: normal password
I have another computer still running v68 (with those same settings) and it's receiving all rcn emails, so it is not a problem with the rcn server.
الحل المُختار
I ran the mail server through some SSL security tests. It failed dismally. Noting that TLS replaced SSL about 20 years ago.
See https://www.immuniweb.com/ssl/pop.erols.com/H4qspLDC/
I suggest you try with no connection encryption as the server does not support anything released in the century on port 995. Thunderbird stopped supporting TLS V1 a long time ago because it is broken. You are getting here now because your a year late upgrading so have been using easily breached connections for a year longer than you needed to.
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الحل المُختار
I ran the mail server through some SSL security tests. It failed dismally. Noting that TLS replaced SSL about 20 years ago.
See https://www.immuniweb.com/ssl/pop.erols.com/H4qspLDC/
I suggest you try with no connection encryption as the server does not support anything released in the century on port 995. Thunderbird stopped supporting TLS V1 a long time ago because it is broken. You are getting here now because your a year late upgrading so have been using easily breached connections for a year longer than you needed to.
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Matt, thanks so much for your reply.
I went into the Config Editor per your link and temporarily set security.tls.version.min to 1 (default = 3) and that worked, so you're correct that the problem is RCN won't accept newer versions of TLS (I tried setting security.tls.version.min to 2, but that also didn't work).
I then went into account settings for my 2 RCN accounts and changed Security to "None" and unsecured password authentication (these changed the port setting to a new default of 110) and now i can receive from both accounts.
Thanks again.