When trying to send an email from Roundcube I get:
Connection failed: Failed to connect socket: fsockopen(): unable to connect to
ssl://mail.covisp.net:587
Sending from any other mail client works on the submission port, so it is not a
mail server configuration issue.
If I change it to tls://mail.covisp.net I get:
SMTP Error in /usr/local/www/roundcube/program/lib/Roundcube/rcube.php (1675):
Authentication failure: STARTTLS failed (Code: )
$ openssl s_client -connect mail.covisp.net:587 -starttls smtp
CONNECTED(00000003)
depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3
verify error:num=2:unable to get issuer certificate
issuer= O = Digital Signature Trust Co., CN = DST Root CA X3
---
Certificate chain
0 s:/CN=covisp.net
i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
i:/O=Digital Signature Trust Co./CN=DST Root CA X3
---
Server certificate
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
subject=/CN=covisp.net
issuer=/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3
---
No client certificate CA names sent
Peer signing digest: SHA512
Server Temp Key: ECDH, P-256, 256 bits
---
SSL handshake has read 3783 bytes and written 468 bytes
---
New, TLSv1/SSLv3, Cipher is ECDHE-RSA-AES256-GCM-SHA384
Server public key is 4096 bit
Secure Renegotiation IS supported
Compression: NONE
Expansion: NONE
No ALPN negotiated
SSL-Session:
Protocol : TLSv1.2
Cipher : ECDHE-RSA-AES256-GCM-SHA384
Session-ID: 41E4C231E6E193E6DAC1CFBA6C890132BD10B24467F056BEBB68BEE0D5D2E275
Session-ID-ctx:
Master-Key:
E40F4A64F059BE52089D0F1F5CCF7E0640C870C618FA4FB97337AF1ED43F4F3A325610088EC67BCB2C5113E5E7CC3D9B
Key-Arg : None
PSK identity: None
PSK identity hint: None
SRP username: None
Start Time: 1519428085
Timeout : 300 (sec)
Verify return code: 2 (unable to get issuer certificate)
---
250 DSN
--
ɹןʇnqן
lbut...@covisp.net
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