Add TLS certificate for email relaying in lists.alpinelinux.org
Hello,
As subject states, lists.alpinelinux.org doesn’t offer a certificate for using STARTTLS in MTA to MTA communication. This can be checked by:
$ openssl s_client -connect lists.alpinelinux.org:25 -starttls smtp
CONNECTED(00000003)
didn't find starttls in server response, try anyway...
22101338425312:error:1400410B:SSL routines:CONNECT_CR_SRVR_HELLO:wrong version number:/usr/src/lib/libssl/ssl_pkt.c:386:
---
no peer certificate available
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No client certificate CA names sent
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SSL handshake has read 208 bytes and written 0 bytes
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New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : 0000
Session-ID:
Session-ID-ctx:
Master-Key:
Start Time: 1540317980
Timeout : 7200 (sec)
Verify return code: 0 (ok)
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Under some email servers setups such as mine, email isn’t relayed if the remote doesn’t provides STARTTLS.
Best regards.
(from redmine: issue id 9573, created on 2018-10-24)