I think the better option would be to find the offending package and downgrade that.

On 12/23/2020 4:37 AM, ChandranManikandan wrote:
Hi Friends,

I have run the yum updates on my centos 7.7 to upgrade 7.9 yesterday.

And acronis backup software was running on 7.7 fine, After upgrading to 7.9 the acronis is not supported and the acronis team has given the support 7.7 and 7.8 version.

I have run below command for updates on my centos 7.7

sudo yum update.

Any possible way to roll back to 7.7 again from 7.9 without affecting my email server.

Has anyone faced a similar issue?
Appreciate your help.


On Wed, Dec 23, 2020 at 1:51 PM ChandranManikandan <[email protected] <mailto:[email protected]>> wrote:

    Hi Folks,

    I have manually renewed the letsencrypt certificate and its
    working fine now.

    Thanks for your help.

    On Wed, Dec 23, 2020 at 1:40 PM <[email protected]
    <mailto:[email protected]>> wrote:

        Most isp block port 25. Use 465 or 587 for outgoing.

        Il giorno 22 dic 2020, alle ore 20:26, ChandranManikandan
        <[email protected] <mailto:[email protected]>> ha scritto:

        
        I have checked the logs above, not showing any error.

        and there is no queue.

        Users are using Thunderbird email client and outlook i have
        select auto option with 25 port is going email, but
        thunderbird i have changed the port and certificate but not
        working


        On Wed, Dec 23, 2020 at 12:12 PM Eric Broch
        <[email protected] <mailto:[email protected]>> wrote:

            Did you look in the logs?

            /var/log/qmail/submission/current

            /var/log/qmail/send/current

            qmailctl queue

            /var/log/maillog


            On 12/22/2020 8:58 PM, ChandranManikandan wrote:
            Hi Eric,

            Thanks for the update.
            Yes, I have updated the first clamav conversion from 102
            to 103 then I ran yum update. It was
            successfully updated all the packages.

            but i have one issue now, We are unable to send email,
            outgoing is not working.
            I have tried 25,587,465 ports, none of that working.
            when i tried from telnet all above ports were opening.

            I have usually used 587 with Starttls for outgoing.

            Can you help me with anything I need to do on the server
            or do I need to run tls certificate again.

            letsencrypt certificate is running with an end date 21st
            Feb 2021.


            On Tue, Dec 22, 2020 at 10:11 PM Eric Broch
            <[email protected]
            <mailto:[email protected]>> wrote:

                You should be okay. I do updates from the console or
                use 'screens' when using putty, so that, in case of
                session failure the update continues and doesn't
                stop in the middle of the update.

                On 12/22/2020 1:30 AM, ChandranManikandan wrote:
                Hi Friends,

                My Centos 7.7 is getting 351 updates on my live server.
                Can i run yum update command to update the machine.

                Anything affects the mail server if i run the yum
                update command.

                Appreciate if anyone can advise me.


-- */Regards,
                Manikandan.C
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