Redis Object Cache

  • Resolved vorticy

    (@vorticy)


    1 year, 11 months ago

    It seems that as Redis Object Cache grows, it will affect the transmission of STMP emails.

    There are two things we see.

    1) When doing a test email we get a timeout error on the reply confirmation but the email still sends. something like: Domain Check cURL error 28 Resolving timed out

    2) when sending confirmations to our gmail it is blocked. 

    <***@gmail.com>: host gmail-smtp-in.l.google.com[142.251.6.27] said:
    550-5.7.26 Unauthenticated email from ****.com is not accepted due
    to 550-5.7.26 domain's DMARC policy. Please contact the administrator of
    550-5.7.26 ultracornhole.com domain if this was a legitimate mail. Please
    visit 550-5.7.26  https://support.google.com/mail/answer/2451690 to learn
    about the 550 5.7.26 DMARC initiative.
    c8-2002**0jam.69 - gsmtp (in reply to end
    of DATA command)

    The way I temporarily fix this is by flushing the cache in Redis plugin. But I think after 12hrs it will come back.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter vorticy

    (@vorticy)

    After some more testing, I’m not sure it has anything to do with Redis.

    It tries to GET from the following but times out:
    https://connect.wpmailsmtp.com/domain-check/
    ?mailer=smtp
    &email=c3VwcG9ydEB1bHRyYWNvcm5ob2xlLmNvbQ=
    &domain

    Method URL
    Status

    All
    Caller
    Component

    All
    Size Timeout Time
    GET https://connect.wpmailsmtp.com/domain-check/
    ?mailer=smtp
    &email=c3VwcG9ydEB1bHRyYWNvcm5ob2xlLmNvbQ=
    &domain cURL error 28: Resolving timed out after 5000 milliseconds
    WPMailSMTP\Admin\DomainChecker->__construct()
    wp-content/plugins/wp-mail-smtp/src/Admin/DomainChecker.php:56
    WPMailSMTP\A\P\TestTab->process_post()
    wp-content/plugins/wp-mail-smtp/src/Admin/Pages/TestTab.php:338
    WPMailSMTP\Admin\ParentPageAbstract->process_actions()
    wp-content/plugins/wp-mail-smtp/src/Admin/ParentPageAbstract.php:265
    do_action(‘admin_init’)
    wp-includes/plugin.php:517
    Plugin: wp-mail-smtp 5 5.0291

    Thread Starter vorticy

    (@vorticy)

    But if I try it again, it usually works.

    ‘Method URL
    Status

    All
    Caller
    Component

    All
    Size Timeout Time
    GET https://connect.wpmailsmtp.com/domain-check/
    ?mailer=smtp
    &email=c3VwcG9ydEB1bHRyYWNvcm5ob2xlLmNvbQ=
    &domain 200 OK
    WPMailSMTP\Admin\DomainChecker->__construct()
    wp-content/plugins/wp-mail-smtp/src/Admin/DomainChecker.php:56
    WPMailSMTP\A\P\TestTab->process_post()
    wp-content/plugins/wp-mail-smtp/src/Admin/Pages/TestTab.php:338
    WPMailSMTP\Admin\ParentPageAbstract->process_actions()
    wp-content/plugins/wp-mail-smtp/src/Admin/ParentPageAbstract.php:265
    do_action(‘admin_init’)
    wp-includes/plugin.php:517
    Plugin: wp-mail-smtp 0.2 kB 5 1.2474`

    Thread Starter vorticy

    (@vorticy)

    I think I fixed my issue. It was a DNS configuration problem. My server is using Ubuntu 22.04.1 LTS and the DNS config file is edited here

    /etc/resolvconf/resolv.conf.d/head

    The thing that fixed the slow dns problem was search line with the domain name. Now when I click the plugins tab for example, it loads in 1sec as opposed to 70sec. Before it would have several API calls, but now it says no API calls. Not sure what is happening but it is working better. 

    # Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
#     DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
search your-domain.com
nameserver 8.8.4.4
nameserver 8.8.8.8

then reset the resolv.conf file and restart bind9
# resolvconf -u
# service bind9 restart
Viewing 3 replies - 1 through 3 (of 3 total)
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