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IMAP with TLS 1.2

symmetry
Newbie
Posts: 3
Registered: Wednesday

IMAP with TLS 1.2

I've been unable to login to my PlusNet IMAP account with the latest version of Outlook for Android.  Today I found a Microsoft support bulletin which announces that TLS 1.0 and 1.1 are now deprecated, and Outlook for Android will only work with TLS 1.2 

Does anyone know what version of TLS the PlusNet mail servers at imap.plus.net and relay.plus.net are using?

4 REPLIES 4
MisterW
Superuser
Superuser
Posts: 9,453
Thanks: 2,382
Fixes: 181
Registered: ‎30-07-2007

Re: IMAP with TLS 1.2

I think you'll find that the PlusNet IMAP server uses SSL on port 993

symmetry
Newbie
Posts: 3
Registered: Wednesday

Re: IMAP with TLS 1.2

Thanks, but what about SMTP:587

seebee
Dabbler
Posts: 18
Thanks: 5
Fixes: 2
Registered: ‎08-07-2017

Re: IMAP with TLS 1.2

They both appear to be TLS v1.2

 

IMAP:

$ openssl s_client -brief -connect imap.plus.net:993
CONNECTION ESTABLISHED
Protocol version: TLSv1.2
Ciphersuite: AES256-GCM-SHA384
Requested Signature Algorithms: RSA+SHA512:DSA+SHA512:ECDSA+SHA512:RSA+SHA384:DSA+SHA384:ECDSA+SHA384:RSA+SHA256:DSA+SHA256:ECDSA+SHA256:RSA+SHA224:DSA+SHA224:ECDSA+SHA224:RSA+SHA1:DSA+SHA1:ECDSA+SHA1
Peer certificate: OU = Domain Control Validated, CN = mail.plus.net
Verification: OK
* OK [CAPABILITY IMAP4 IMAP4REV1] perdition ready on mail.plus.net 00029fa9
DONE

 

SMTP:

$ openssl s_client -brief -starttls smtp -connect relay.plus.net:587
CONNECTION ESTABLISHED
Protocol version: TLSv1.2
Ciphersuite: ECDHE-RSA-AES256-GCM-SHA384
Peer certificate: OU = Domain Control Validated, CN = relay.plus.net
Hash used: SHA256
Signature type: RSA
Verification: OK
Supported Elliptic Curve Point Formats: uncompressed:ansiX962_compressed_prime:ansiX962_compressed_char2
Server Temp Key: ECDH, P-256, 256 bits
250 OK
quit
221 avasout07 smtp closing connection
CONNECTION CLOSED BY SERVER

symmetry
Newbie
Posts: 3
Registered: Wednesday

Re: IMAP with TLS 1.2

Thanks for your help