I've installed certificates on both CentOS 6 & 7 using GoDaddy and LetsEncrypt.

On 8/12/2018 9:12 PM, ChandranManikandan wrote:
Hi Eric,

I think i already installed the certificate which was 512 and got expired on the server.

Can i try to install the certificate which you advised and sent link earlier.

I just want to make sure, the problem will not come after install this in the production server.
Have you tried in COS6 32 and 64 bit server.
Because am running both the version in different server.



On Fri, Aug 10, 2018 at 2:03 PM, Eric Broch <ebr...@whitehorsetc.com <mailto:ebr...@whitehorsetc.com>> wrote:

    Office 365 my require a signed certificate from a Certificate
    Authority.


    On 8/9/2018 10:23 PM, ChandranManikandan wrote:
    Hi Eric,

    I think the certificate was expired and the date is in
    server -rw-r--r-- 1 root   qmail 1.7K Mar 22  2013 servercert.pem

    I have checked the certificate validity in outlook while opening.

    FYR. PFA

    On Wed, Aug 8, 2018 at 9:58 PM, Eric Broch
    <ebr...@whitehorsetc.com <mailto:ebr...@whitehorsetc.com>> wrote:

        Is the current cert self signed or is it expired?


        On 8/7/2018 10:30 PM, ChandranManikandan wrote:
        Hi Friends,

        Thank you for your support.

        I have solved the Thunderbird issue in Ubuntu 18 version.

        Just open the folder of imap and removed cert8.db and
        certoverride.txt then reconfigured the email.
        It was successfully configured with accept the confirm
        security exception message.

        But am unable to configure in outlook 2016.
        I have created new profile in outlook and tried also, the
        same issue is happening.

        Outlook 2010 is working fine.

        Hi Eric,

        Do i need to reinstall the ssl certificate on COS6 32 bit as
        you given the url.
        Can i follow the instruction to do that.
        Because this is production server that's what worried.


        On Tue, Aug 7, 2018 at 2:18 AM, Rodrigo Cortes
        <rap...@gmail.com <mailto:rap...@gmail.com>> wrote:

            Work fine in all modern devices and browser and a simple
            script can do the work for renew :)

            El El lun, 6 de ago. de 2018 a las 14:16, Remo Mattei
            <r...@mattei.org <mailto:r...@mattei.org>> escribió:

                The only thing I do not like about let’s encrypt is
                that every 90 days my iPhone, was complaining about
                the cert.. etc.. so for 12 dollars 2years.. it’s all
                worth it.

                Remo

                On Aug 6, 2018, at 11:09, Rodrigo Cortes
                <rap...@gmail.com <mailto:rap...@gmail.com>> wrote:

                Hi!

                Use letenscrypt is free :)

                And work fine

                El El lun, 6 de ago. de 2018 a las 12:28, Remo
                Mattei <r...@mattei.org <mailto:r...@mattei.org>>
                escribió:

                    https://www.ssls.com <https://www.ssls.com/>



                    On Aug 6, 2018, at 09:26, Eric Broch
                    <ebr...@whitehorsetc.com
                    <mailto:ebr...@whitehorsetc.com>> wrote:

                    Where'd you get this certificate?


                    On 8/6/2018 8:46 AM, Remo Mattei wrote:
                    I just bought a two year valid cert fro 11.98
                    or so less than $12



                     *dal mio iPhone X*

                    Il giorno 06 ago 2018, alle ore 07:20, Eric
                    Broch <ebr...@whitehorsetc.com
                    <mailto:ebr...@whitehorsetc.com>> ha scritto:

                    A signed certificate (not self-signed) may
                    be required by Outlook365. If you use
                    LetsEncrypt it won't cost a thing. If I
                    remember correctly Outlook for my tablet
                    required a signed certificate.

                    https://www.qmailtoaster.org/ssl.html
                    <https://www.qmailtoaster.org/ssl.html>


                    On 8/6/2018 2:12 AM, ChandranManikandan wrote:
                    Hi Peter,

                    We are using office 365 latest version 2016
                    and office 2010.
                    Office 2010 is working perfect without any
                    issue but the latest version outlook 2016
                    (Office 365) is having the problem.
                    Even unable to configure the new IMAP email
                    account.
                    Am always getting this certificate warning
                    message whenever opening outlook or
                    configure outlook.
                    Is it required? PFA warning message.

                    My toaster config is below and cache config
                    is in passdb in my toaster.conf. What would
                    you advise it.


                    # Settings for 'stock' qmail-toaster

                    auth_cache_size = 32M
                    #auth_mechanisms = plain login digest-md5
                    cram-md5
                    auth_mechanisms = plain login digest-md5
                    auth_username_format = %Lu
                    first_valid_uid = 89
                    #first_valid_gid = 89
                    log_path = /var/log/dovecot.log
                    login_greeting = Dovecot toaster ready.
                    #mail_plugins = $mail_plugins quota
                    plugin/quota = maildir
                    protocols = imap
                    ssl_cert = </var/qmail/control/servercert.pem
                    ssl_key = </var/qmail/control/servercert.pem
                    # the following will likely be the default
                    at some point
                    ssl_dh_parameters_length = 2048

                    namespace {
                      inbox = yes
                    location =
                    #  prefix =
                       prefix = INBOX.
                    # Use 'prefix = INBOX.' for Courier-IMAP
                    compatible transparent migration.
                    # This forces all client apps to create
                    subfolders underneath/within
                    # the inbox instead of adjacent to it. It's
                    not necessary to be that way.
                    # FWIW, shubes thinks this setting is
                    annoying/rediculous/retarded.
                    # As a practical example, having no prefix
                    allows mobile users to select
                    # which folders get synchronized. Otherwise
                    their whole mailbox is
                    # synchronized, and they have no way to
                    choose which folders they want sync'd.
                    separator = .
                      type = private
                    }

                    passdb {
                      args = cache_key=%u webmail=127.0.0.1
                      driver = vpopmail
                    }

                    #protocol imap {
                    # imap_client_workarounds = "delay-newmail"
                    # mail_plugins = $mail_plugins imap_quota
                    # mail_max_userip_connections = 500
                    #}

                    #protocol pop3 {
                    # pop3_client_workarounds = outlook-no-nuls
                    oe-ns-eoh
                    # pop3_fast_size_lookups = yes
                    # pop3_lock_session = yes
                    # pop3_uidl_format = UID%u-%v
                    #}

                    userdb {
                      args = cache_key=%u
                    quota_template=quota_rule=*:backend=%q
                      driver = vpopmail
                    }

                    plugin {
                      quota = maildir:ignore=Trash
                    quota_rule = ?:storage=0


                    Hi Eric,

                    I have tried to click Confirm security for
                    store but no process happened. means the
                    screen is idle it couldn't happened anything.
                    All other systems are configured old
                    thunderbird version in ubuntu and all
                    showing the same message and able to store it.
                    But the newer version unable to store it.




                    On Mon, Aug 6, 2018 at 2:57 PM, Peter
                    Peltonen <peter.pelto...@gmail.com
                    <mailto:peter.pelto...@gmail.com>> wrote:

                        Not sure if this relates to any of your
                        problems:

                        I had a few days ago problem with a
                        Outlook 2016 stopping receiving
                        email suddenly.

                        I chased this down to Outlook claming
                        the server did not support the
                        correct authentication method, which
                        was strange as nothing had
                        changed on the server side for a while.
                        The same user's iPhone with
                        the same username/password was working
                        at the same time correctly.

                        What I think it was Dovecot caching
                        credentials somehow wrong:
                        differet caching for iPhone and Outlook
                        causing the problem. I solved
                        it by changing

                        cache_key=%u

                        entries to

                        cache_key=%u%r

                        in /etc/dovecot/toaster.conf

                        so Outlook connecting from different IP
                        got cached differently than
                        the iPhone. Don't know what will happen
                        when they appear in the same
                        WLAN though...

                        Why did this not happen before, I don't
                        know, perhaps Outlook has been
                        updated and uses now some other auth by
                        default than before?

                        Not sure if this relates to your
                        problem at all, as I am running
                        pretty old Dovecot...

                        Best,
                        Peter

                        On Mon, Aug 6, 2018 at 9:19 AM,
                        ChandranManikandan <kand...@gmail.com
                        <mailto:kand...@gmail.com>> wrote:
                        > Hi Eric,
                        >
                        > Yes, we are using Ubuntu latest 64
                        bit version,
                        > We tried to configure the imap email
                        and we got the attached message and
                        > couldn't configure it.
                        >
                        > Any one face the same issue.
                        >
                        > Please help me to resolve the issue.
                        >
                        > As well the same issue on Outlook
                        2016 unable to receive emails.
                        >
                        > Everything work well before but
                        latest version having the issue.
                        > Is it need to install any certificate
                        on our server.
                        >
                        > Am using COS 6 32 bit , Qmailtoaster.
                        >
                        >
                        >
                        > On Mon, Aug 6, 2018 at 1:22 PM,
                        ChandranManikandan <kand...@gmail.com
                        <mailto:kand...@gmail.com>>
                        > wrote:
                        >>
                        >> Hi Eric,
                        >>
                        >> Yes, we are using Ubuntu latest 64
                        bit version,
                        >> We tried to configure the imap email
                        and we got the attached message and
                        >> couldn't configure it.
                        >>
                        >> Any one face the same issue.
                        >>
                        >> Please help me to resolve the issue.
                        >>
                        >> As well the same issue on Outlook
                        2016 unable to receive emails.
                        >>
                        >> Everything work well before but
                        latest version having the issue.
                        >> Is it need to install any
                        certificate on our server.
                        >>
                        >> Am using COS 6 32 bit , Qmailtoaster.
                        >>
                        >>
                        >>
                        >> On Mon, Aug 6, 2018 at 5:59 AM, Eric
                        Broch <ebr...@whitehorsetc.com
                        <mailto:ebr...@whitehorsetc.com>>
                        >> wrote:
                        >>>
                        >>>
                        >>> Just an FYI.
                        >>> If your client is using Ubuntu
                        18.04 there is an issue with the network
                        >>> stopping on the local pc.
                        >>> To test get your client to use the
                        GUI network manager and disconnect
                        >>> wait
                        >>> a few seconds then reconnect.
                        >>> We are chasing a similar issue now
                        for a client.
                        >>> To see if this is the issue either
                        try pinging out of the network or
                        >>> loading a web page.
                        >>>
                        >>> best wishes
                        >>>  Tony White
                        >>>
                        >>> On 03/08/18 01:16, Eric Broch wrote:
                        >>>
                        >>> Can you check if the password for
                        the account is saved in Thunderbird on
                        >>> the Ubuntu desktop?
                        >>>
                        >>> In Thunderbird go to
                        Tools->Options->Security->Saved Passwords
                        >>>
                        >>>
                        >>> On 8/2/2018 4:52 AM,
                        ChandranManikandan wrote:
                        >>>
                        >>> Hi Friends,
                        >>>
                        >>> One of our user getting
                        disconnected frequently from
                        thunderbird (Asking
                        >>> passwords) and webmail also not
                        opening.
                        >>>
                        >>> After restart the dovecot service
                        it will working again.
                        >>> But the password is asking frequently.
                        >>> I have restarted the dovecot
                        service frequently.
                        >>>
                        >>> This problem for only one user rest
                        of other users not an issue.
                        >>>
                        >>> I couldn't trace the logs in
                        /var/log/maillog and /var/log/dovecot.log
                        >>>
                        >>> Anyone face the same issue .
                        >>>
                        >>> Could anyone help me to resolve
                        this issue.
                        >>>
                        >>> Note: User is using Ubuntu Desktop
                        with Thunderbird.
                        >>>
                        >>> --
                        >>> Thanks & Best Regards,
                        >>> Manikandan.C
                        >>>
                        >>>
                        >>> --
                        >>> Eric Broch
                        >>> White Horse Technical Consulting (WHTC)
                        >>>
                        >>>
                        >>
                        >>
                        >>
                        >> --
                        >> Thanks & Best Regards,
                        >> Manikandan.C
                        >
                        >
                        >
                        >
                        > --
                        > Thanks & Best Regards,
                        > Manikandan.C
                        >
                        >
                        
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                    Manikandan.C
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                    White Horse Technical Consulting (WHTC)





-- */Thanks & Best Regards,
        Manikandan.C
        /*

-- Eric Broch
        White Horse Technical Consulting (WHTC)




-- */Thanks & Best Regards,
    Manikandan.C
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