Hi Eric:

Here's what I get - BTW - I did see a reference in a forum post that AUTH=DIGEST-MD5 should be removed from dovecot

SSL-Session:
    Protocol  : TLSv1.2
    Cipher    : ECDHE-RSA-AES256-GCM-SHA384
    Session-ID: 611DF740642D8DD1BED7CF03AF5C9CB6930406E3BA4D76A1BBC25A1275B1B9AF
    Session-ID-ctx:
    Master-Key: BA0399E80DE9DF60F0B90CFBE2B6C58438AB03DB427ECFE233A062DBDEBD7237824AAF8CB6666D445AEE22E184F863A6
    Key-Arg   : None
    Krb5 Principal: None
    PSK identity: None
    PSK identity hint: None
    TLS session ticket lifetime hint: 300 (seconds)
    TLS session ticket:
    0000 - 8d f7 50 89 e0 14 cc 94-95 cf ab 4b af d9 a3 3f ..P........K...?
    0010 - a9 9e 48 2b 48 5d a4 a1-37 62 f4 ed 62 43 31 e4 ..H+H]..7b..bC1.
    0020 - 51 49 3a 3c 25 6a 22 8c-99 f0 60 bf d0 df b8 4c QI:<%j"...`....L
    0030 - 22 e8 da 05 9e 4e ef f0-7c 16 ae c5 af 16 1e 01 "....N..|.......
    0040 - 82 9a 62 79 93 0c 1b 73-bd b9 90 96 8e 5a 94 5d ..by...s.....Z.]
    0050 - d6 9b 84 d4 88 1d 81 41-7a 24 29 97 d9 0f c5 6f .......Az$)....o
    0060 - b8 69 ed b8 28 ce 62 82-03 4e e8 05 fb 8d 85 ae .i..(.b..N......
    0070 - a5 21 9d 17 f7 1e f1 7e-14 75 4a 79 56 c7 f3 95 .!.....~.uJyV...
    0080 - c3 bc 50 90 de b0 51 1b-48 1c 4f df 9a 58 0d 4b ..P...Q.H.O..X.K
    0090 - c1 42 cb 64 4f 6c e9 7b-d5 1d 4a 04 dd 89 2a 2d .B.dOl.{..J...*-

    Start Time: 1630549460
    Timeout   : 300 (sec)
    Verify return code: 0 (ok)
---
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE AUTH=PLAIN AUTH=LOGIN AUTH=DIGEST-MD5 AUTH=CRAM-MD5] Dovecot toaster ready. a OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS THREAD=ORDEREDSUBJECT MULTIAPPEND URL-PARTIAL CATENATE UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS BINARY MOVE QUOTA] Logged in
* BYE Logging out
a OK Logout completed (0.001 + 0.000 + 0.001 secs).
closed


On 9/1/2021 8:49 PM, Eric Broch wrote:

Try this script (replace with relevant user, password, & host) from the command line of the server. It will yield what version of TLS you're running.

<script>

#!/bin/bash

function imapscript () {
echo "a login $1 $2"
echo 'a logout'
sleep 1
echo 'quit'
}

[email protected]
pass=***********
host=mail.mydomain.com

imapscript "$user" $pass  | openssl s_client -crlf -connect $host:993

</script>

On 9/1/2021 6:29 PM, Eric Broch wrote:
Does your web mail work?
On Sep 1, 2021, at 5:12 PM, Jeff Koch <[email protected] <mailto:[email protected]>> wrote:

    Neither IMAP or IMAPS will connect - Jeff

    On 9/1/2021 6:16 PM, Eric Broch wrote:

    What protocol, IMAP, IMAPS, SMTPS...?

    On 9/1/2021 2:36 PM, Jeff Koch wrote:

    We have a customer trying to connect to his qmail-toaster email
    account using the MicroSoft Outlook app on an Android phone. He
    keeps getting bounced off with the message 'can't connect to
    server' or 'can't login'.  I did some research on the MS forums
    and apparently this Outlook app only connects with SSL (no
    STARTTLS) and TLS 1.2 or higher.  If the mailserver tries
    anything else first the connection is dropped.

    Is there any known work-around or configuration adjustment
    needed to get this Android Outlook app to work with the toaster.

    We're running qmail-1.03-2.2.qt.cdb.el7.x86_64.rpm

    Thanks, Jeff


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