What version of qmail?
On 12/1/2020 4:27 PM, Angus McIntyre wrote:
I have to support a user who's using OS X El Capitan, which apparently
tops out at TLSv1.0.
Her laptop is able to connect with POP but not with SMTP, so she can
fetch mail but can't send it.
From the logs, it looks as if the POP connection is using TLSv1.0:
Dec 1 10:51:33 Mail[607] <Debug>: Connected: <MFPOPConnection:
0x7f9cc1784250> (Connected) account: <MFPOPAccount: 0x7f9cc14aa060>
[email protected] mail.mydomain.com (86AF8F8F-25BD-4F1A-
951C-BCFEF683E482)
hostname: mail.mydomain.com, port: 995, security layer:
kCFStreamSocketSecurityLevelTLSv1_0
but something's going wrong with the SMTP connection:
Dec 1 22:17:47 Mail[422] <Debug>: Could not connect:
<MFSMTPConnection: 0x7fd092941340> (Disconnected) account:
<MFSMTPAccount: 0x7fd0907bda50> [email protected] mail.mydomain.com
(17D6BCC2-55B9-4B40-BC11-7A55331154F3) (Error
Domain=NSOSStatusErrorDomain Code=-9836 "(null)")
My guess is that this is a STARTTLS issue and it's probably related to
El Capitan's limited support for TLS. Is it possible that POP and
SMTP use different sets of supported ciphers? And, if so, how can I
enable TLSv1.0 on SMTP?
(And yes, I know that I should not be enabling TLSv1.0 and that the
solution is to upgrade the user's machine -- but that isn't an option
just now, and I need a stopgap).
Thanks for any help,
Angus
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