> On May 24, 2017, at 5:30 AM, Rick Leir <[email protected]> wrote:
>
> Should this TLS warning worry me?
No.
> May 23 11:35:43 myHostName postfix/smtpd[6619]: SSL_accept error from
> sonic310-27.consmr.mail.ne1.yahoo.com[66.163.186.208]: 0
> May 23 11:35:43 myHostName postfix/smtpd[6619]: warning: TLS library problem:
> error:14094416:SSL routines:SSL3_READ_BYTES:sslv3 alert certificate
> unknown:s3_pkt.c:1262:SSL alert number 46:
> May 23 11:35:43 myHostName postfix/smtpd[6619]: lost connection after
> STARTTLS from sonic310-27.consmr.mail.ne1.yahoo.com[66.163.186.208]
>
> May 23 11:35:43 myHostName postfix/smtpd[6619]: connect from
> sonic310-27.consmr.mail.ne1.yahoo.com[66.163.186.208]
> May 23 11:35:43 myHostName postfix/smtpd[6619]: 6C9CF41E45:
> client=sonic310-27.consmr.mail.ne1.yahoo.com[66.163.186.208]
Some misconfigured Yahoo systems don't understand how to do
opportunistic TLS. They do however know how to needlessly
downgrade themselves to cleartext. See:
http://postfix.1071664.n5.nabble.com/Another-yahoo-problem-td89756.html
--
Viktor.
