QuickAnswer
by

Check your mail server settings SPF DKIM

Check your mail server settings SPF DKIM
Category：Web Server
Pub.date：2019-10-08

Check to see if your email account is set up correctly on the mail server.

Check the SPF and DKIM settings.

Use the check service

Just send a blank email to check-auth@verifier.port25.com.

Example of return letter

This message is an automatic response from Port25's authentication verifier
service at verifier.port25.com.  The service allows email senders to perform
a simple check of various sender authentication mechanisms.  It is provided
free of charge, in the hope that it is useful to the email community.  While
it is not officially supported, we welcome any feedback you may have at
<verifier-feedback@port25.com>.

Thank you for using the verifier,

The Port25 Solutions, Inc. team

==========================================================
Summary of Results
==========================================================
SPF check:          pass
"iprev" check:      pass
DKIM check:         pass
SpamAssassin check: ham

The following is omitted

This is a correct example. I appreciate the detailed description of the survey.

Please.

Many mail servers do not even have SPF set correctly.

I urge you to do this check.

CONTENTS
Plesk
How to install SSH2 extension for PHP8.3 on Plesk
Flutter
Android Studio. Could not determine java version. Unable to find bundled Java version.
JavaScript
Video loading with JavaScript
Unreal Engine
Even if the package succeeds in Unreal Engine 5 (5.0.3), nothing is displayed on .exe launch
Web Server
WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED
Plesk
Unbanning an IP that has been banned by fail2ban via SSH
Flutter
flutter: Erase the DEBUG band on the upper right
Flutter
flutter: uses-sdk:minSdkVersion 16 cannot be smaller than version 19 declared in library
JavaScript
this in JavaScript changes. How to keep it unchanged.
CakePHP4
Package setasign/fpdi-tcpdf is abandoned, you should avoid using it. No replacement was suggested.
CakePHP4
Warning with CakePHP 4.4. Deprecated: Use of `BaseErrorHandler` and subclasses are deprecated.
PHP
MySQL in XAMPP does not start. Error message in red
CakePHP3
Class Cake\Composer\Installer\PluginInstaller is not autoloadable, can not call post-autoload-dump script
3D
SkySphere Rendering Settings in Lightwave 3D
3D
SkyBox rendering settings in Lightwave 3D
CSS
Overlay elements with display: grid in CSS. position: absolute is not used.
JavaScript
Media queries in JavaScript, matchMedia() Branching by browser width
Flutter
Place AdMob banner ads in Flutter in footer or inline
Flutter
Fix the orientation of the Flutter app vertically
Flutter
Multilingualize with Flutter, dynamically switch languages, save languages, hamburger menu
Flutter
Released Android app developed by Flutter on Google Play
Flutter
Sound playback with Flutter Sound effect playback
Flutter
Use SVG images in Flutter
Web Server
Warning: Using a password on the command line interface can be insecure.
Flutter
ITMS-90683: Missing Purpose String in Info.plist
Flutter
ITMS-90078: Missing Push Notification Entitlement
Flutter
Dart SDK is not configured
Other
From 21H2 of Windows 11 and Windows 10, the character code handling of filenames is now UTF-8.
Plesk
Uncompress (decompress) the .tzst extension Zstandard compressed tar file ZSTD
Plesk
Plesk: Bulk download of email data
Android
SOLUTION: Please take action: your app does not comply with Google Plays policies
PHP
Install ssh2 extension on Plesk PHP8.1
PHP
Setup SSH2 on XAMPP PHP8.1 using ssh2_connect()
JavaScript
Fixed HTML modal window background
PHP
php json_decode results in NULL. Include backslash
Other
Cannot PUSH in SourceTree. Logon failed, use ctrl+c to cancel basic credential prompt.
JavaScript
Old Browser Judgment Judgment for Safari13 and Safari14 and above
Plesk
Steps to install ssh2 extension on PHP 8.0 in Plesk
Plesk
Plesk Migration error /usr/local/psa/admin/plib/api-cli/domain_pref.php
JavaScript
Send POST with JavaScript
CakePHP4
Toggle CakePHP4 validation rules
Plesk
Changed Plesk FTP access from active to passive
Web Server
AWS LightSail CentOS8 to AlmaLinux8
Android
resource android:color/system_neutral1_1000 not found.
Other
Setting up AlmaLinux on Windows 11 Hyper-V
Other
Delete the Windows DNS resolver cache
CakePHP4
CakePHP4 Mailer Return-Path setting mb_send_mail 5th argument additional_params
Other
Windows11 Widen the width of scroll bars
CakePHP4
List of compatible PHP versions for CakePHP
Other
Email from OpenBugBounty. Security Vulnerability Notification
Photoshop
Working with WebP format images in Photoshop
Photoshop
Photoshop is heavy. Slow.
Other
Modify a file in Windows but do not want to change the modification date/time timestamp
JavaScript
String conversion library Display dates in Japanese Display numbers in millions
JavaScript
Input form formatting and data checking and validation
JavaScript
JavaScript multifunctional smooth scrolling SVG support
JavaScript
Asynchronous loading of multiple JSON in JavaScript
JavaScript
Determine if it is a modern browser or not User agent not used
Other
Got error 176 Read page with wrong checksum from storage engine Aria
Unreal Engine
UE4 GPU is crashing or D3D device has been removed
JavaScript
In YouTube video embedding, perform arbitrary processing after the video is stopped.
CakePHP4
Composer detected issues in your platform: Your Composer dependencies require a PHP version ...
Web Browser
Do not let Firefox search from the URL field.
Web Server
Debugging mod_rewrite and RewriteRule. Displaying matched values for regular expressions.
CSS
CSS counter Auto-numbering summary
CSS
Summary of variables (custom properties) in CSS
Other
File access is slow when using Drive for Desktop.
Web Browser
Firefox Revive the right-click menu Display image information
Other
PC wont start.　ASUS The system has POSTed in safe mode.
Plesk
Plesk Change TLS protocols type
Other
How to convert boot disk from MBR to GPT non-destructively and completely free of charge in preparation for Windows 11.
Android
Android app works locally, but not when published to the store
Blender
Blender What to do when the Smoke effect does not produce flames.
iOS
Rejected in iOS app registration application Guideline 4.3 - Design
iOS
Rejected in iOS app registration application Guideline 2.1 - Performance - App Completeness
iOS
Rejected in iOS app registration application ITMS-90713: Missing Info.plist value
iOS
Rejected in iOS app registration application Guideline 2.5.10 - Performance - Software Requirements
iOS
Rejected in iOS app registration application Guideline 4.2 - Design - Minimum Functionality
iOS
Rejected in iOS app registration application Invalid Binary.
iOS
Rejected in iOS app registration application ITMS-90035: Invalid Signature
iOS
iOS app upload error Missing or invalid signature
iOS
Cocoapods setup on M1 Mac
iOS
Recorded with Xcode iOS Simulator. Preparation required
iOS
SwiftUI Localization of app name
iOS
Xcode display of compilation time
iOS
SwiftUI Video playback without displaying the video controller
Android
Android application development Fixed rotation of display screen Fixed vertically Fixed horizontally
iOS
SwiftUI Display image. Resize and display
iOS
SwiftUI Save the data to the terminal. Used within the app
iOS
SwiftUI @State、@ObservedObject、@EnvironmentObject
iOS
SwiftUI Multilingualization procedure and usage
iOS
SwiftUI TextField that accepts only numbers. Safely Int conversion
iOS
SwiftUI Stop smoothing the movement without permission
iOS
SwiftUI Overlay the image on the image at any position
iOS
SwiftUI Full display on iPad tablet. Do not get smaller on the left side
iOS
Swift Fix the app vertically
Plesk
Error email from Plesk. ls: cannot open directory /usr/lib64/httpd/modules: Permission denied
Android
Android application development, using View Binding
Android
Android application development, data transfer to another activity
Android
Android application development, theme color change. Dynamic switch to dark theme
Android
Android app development, hide keyboard with background tap
Android
Android app development, hide title bar
Android
Android application development, switch display language within the application
Android
Android application development, margins can be created at the top and bottom of ImageView
Plesk
Plesk channel: no 'mirrors.sought.rules.yerp.org' record found, channel failed
Plesk
Diagnose and repair Plesk WARNING in database
Plesk
Diagnose and repair Plesk WARNING on web server and FTP server
Plesk
If you register the same domain as the full host name in Plesk and delete it, you will not be able to send mail to the root
Web Server
Emails sent to hotmail.com, live.com, msn.com, outlook.com are returned with an error.
Android
Android application development. SVG image is not displayed. string too large - instead as ＆apos;STRING_TOO_LARGE＆apos;.
Web Browser
SVG format favicon
JavaScript
Checking HTML radio buttons does not mark checked
PHP
Add date and time to filename in phpMyAdmin database export
Web Server
Cross-origin resource sharing (CORS) that handles multiple domains in the Access-Control-Allow-Origin header
CakePHP4
cakephp4 failed to open stream: No such file or directory in /path/to/vendor/composer/autoload_real.php on line 71
Plesk
Stack of processes where Plesk repair does not finish
Plesk
Corruption repair of Plesk. Table MailOutgoingMessagesStats
Plesk
Plesk. Checking for nginx ULIMIT value 1 domains have been found on server.
Plesk
Plesk repair db does not fix the error
Plesk
Backup and Restore Plesk psa Database
Plesk
I can't send a Plesk mail form email. mb_send_mail 554:5.7.0
CakePHP4
CakePHP4 Save View output to a file.
CakePHP4
Bing Maps. Creating CakePHP4 components
CakePHP4
Behaviors to save the change history of a table to another table in CakePHP4
CakePHP4
Disabling CSRF in CakePHP4 for specific controllers and actions
PHP
error handling Can't connect to local MySQL server through socket /tmp/mysql.sock
Plesk
Plesk key update delay notification. License auto-renewal fails.
Plesk
Unable to use mail and mb_send_mail in Plesk. It returns an error.
Plesk
Lets Encrypt certificates used to strengthen Plesk server security are not automatically renewed
3D
Create 3D photos for Facebook using computer graphics, Lightwave.
CakePHP4
Error in CakePHP4 Missing CSRF token body in /path/to/Middleware/CsrfProtectionMiddleware.php on line 254
Plesk
Error with PHP Composer in Plesk Could not update the integration plugin
CakePHP4
Error running CakePHP4 with XAMPP 7.4.4 (PHP 7.4.4). The datasource configuration debug_kit was not found
Illustrator
Insert and print name and barcode in Illustrator
Plesk
SPF spam protection in Plesk
Plesk
Unable to upload large files in Plesk. client intended to send too large body
Plesk
Plesk license key is not updated. 502 Bad Gateway. Update manually.
CakePHP4
Using components in Command (formerly Shell) in CakePHP4.
CakePHP4
Fine-grained control of CSRF Middleware coverage in CakePHP4. Don't let CSRF check only specific controllers.
Plesk
Adding DNS CAA records in Plesk
Plesk
Hide the Plesk Apache Welcome page, to which the WAF redirects.
Plesk
Plesk . PHP Fatal error: Call to undefined function mb_convert_encoding()
Plesk
AWS Plesk . Can not bind a socket to address subdom.mydom.tld:715 - Cannot assign requested address
Plesk
Plesk admin panel opens when accessing the domain hosted by Plesk using https.
Plesk
Using Plesk Migrator with AmazonAWS Lightsail.
Plesk
Lets Encrypt renewal fails in Plesk. Unable to issue certificate. Could not secure domains
Plesk
Logs of upgrading from Plesk Onyx to Obsidian
Plesk
Plesk PHP Fatal error: Call to undefined function mysqli_connect()
Plesk
SSH2 Extension setup for Plesk php7.3
Plesk
Apply LetsEncrypt only to www subdomains in Plesk
Plesk
Plesk task remains at 0% and does not progress. Unstacking a task
CakePHP3
Dynamic optimization (compacting) of CakePHP3 view output, eliminating indentation and other waste in .ctp output.
Plesk
ImunifyAV fails to scan Failed to scan in Plesk
Web Server
Check your mail server settings SPF DKIM
Plesk
Plesk Obsidian Setting the full host name is not reflected.
Other
Update Thunderbird to Ver.68 64bit.(Windows10)
Plesk
Execute php with Plesk php exec, using Imagick
NextCloud
Nextcloud setup with Plesk extension Aiming to reduce weight
JavaScript
Bulk Event Tracking in GoogleAnalytics gtag.js
Web Server
Disallow access from MJ12bot
CakePHP3
20110#0: * connect() failed (111: Connection refused) while connecting to upstream
Android
Errors in Android Application Development net::ERR_CLEARTEXT_NOT_PERMITTED
Web Browser
Summary of forced reloads (super reloads) in each browser
3D
Procedure for creating a 3D PDF from Lightwave3D
PHP
ImageMagick installation in XAMPP for Windows php7.2.9
JavaScript
Create Adobe Brackets minimum configuration extension with javaScript
JavaScript
Create a Visual Studio Code minimum configuration extension in JavaScript
CakePHP3
Validation does not work in CakePHP3 (CakePHP3.6). It passes without being evaluated.
Plesk
Plesk's CRON runs in UTC instead of JST. service crond restart does not fix the problem.
Plesk
Difference between non-existent files and non-existent directories when setting up error pages in Plesk PHP-FPM
Web Server
/bin/bash^M: bad interpreter: No such file or directory
CakePHP3
The format of date retrieved by CakePHP3 is 2-digit year. Change the default to 4 digits per year.
Plesk
SSH2 Extension setup for Plesk php7.2
PHP
XAMPP PHP7.2 SSH2。 Call to undefined function ssh2_connect()
SVG
Embedding SVG into CSS with dataURL
Web Server
Automatic multi-generational archiving of the entire specified directory of a web server to local CRON.
Web Server
Automatic backup of multiple generations of MySQL database on web server (dump output)
NextCloud
Eliminate or change the file that is automatically placed when a user is created in NextCloud. Or change it.
Web Server
Don't show index.php in NGINX. Want to omit index.php. Prevent redirection loops.
Plesk
NextCloud(OwnCloud) setup with Plesk and infinite storage with amazonS3 connection
Docker
Create a Docker for Windows VM image on a location other than the C drive
Docker
Docker OCI runtime create failed. Is it the volumes in docker-compose.yml ?
Web Browser
Change the timeout value of Firefox
CSS
Normal display in IE11 on Windows 10, but layout is broken in IE11 on Windows 7.
CakePHP3
XAMPP is slow, development on localhost is slow. Poor response time. increase the priority of IPv4.
Plesk
Delete read emails from before Plesk n days
Plesk
Plesk postfix mail send failure to resend behavior. Handling of resend mail queue.
Plesk
Plesk Onyx PHP Warning: fsockopen(): php_network_getaddresses: getaddrinfo failed: Name or service not known
Plesk
Upgrading from Plesk Onyx 17.5.3 to 17.8.11
Plesk
Plesk detected an inconsistency in the system's Package Manager database. Resolved this issue manually
Plesk
Extension of Plesk Mail Log Retention Period
CSS
CSS flexbox display:flex summary
SVG
Gaps appear in inline SVGs, IE gets smaller, and they don＆apos;t display properly.
PHP
Converting a string into an array of single characters in php
Plesk
Bulk registration of restricted IP addresses for administrator access to Plesk
Plesk
Bulk Email Address Registration in Plesk
Plesk
In Plesk, save only the email configuration without including the email content
Plesk
Plesk /etc/httpd/logs/error_log Can't locate CGI/Carp.pm
Plesk
Error with perl (CGI) in Plesk. End of script output before headers
Plesk
Changing the provider associated with a customer in Plesk
JavaScript
ECMAScript 2015 Syntax Memorandum
PHP
HTML syntax checking with PHP. I want to get an error for no end tag or wrong tag nesting.
CakePHP3
In CakePHP3, the time zone of DATE type field is UTC
JavaScript
First time with ECMAScript 2015 and Babel
SVG
Hatching pattern memorandum in SVG
Plesk
I can't see the site in Chrome on my old Mac. ERR SPDY INADEQUATE TRANSPORT SECURITY
WebAssembly
I've set up a WebAssembly environment. What do I need to write to make it work?
WebAssembly
I set up the WebAssembly environment. What do I need to write to make it work?
Plesk
Blank screen for certain users in Plesk RoundCube. Blank page display. date.timezone setting.
Plesk
error connect() failed (111: Connection refused) while connecting to upstream
Web Server
Refused to send email 550 5.7.606 Access denied. mail.protection.outlook.com
Web Server
Massive 404 access Microsoft Office Protocol Discovery
CakePHP2
Error after moving CakePHP2 to a new server. open_basedir restriction in effect
Plesk
Plesk ModSecurity Failed to update ruleset.　modsecurity_ctl failed
CakePHP3
CakePHP3で、PHP Parse error: syntax error, unexpected T_USE, expecting
Plesk
Checking load average in Plesk
CakePHP3
The position of label in CakePHP3 HTML radio button is different from CakePHP2. input tag cannot be controlled.
Plesk
Composer in Plesk Use Composer in Presque
CakePHP3
Get the address (path) of an img that is not a CakePHP3 img tag. Specify the extension
CakePHP3
CakePHP3 date display is not year/month/day (YYYY-MM-DD)
Plesk
Outdated intl.so on a web server in Plesk environment? ICU is outdated?
CakePHP3
Checking if a field's value is unique in CakePHP3 validation
CakePHP3
CakePHP3 Database Update Log with Behaviors
CakePHP3
Error with intl ICU in CakePHP3. CORE/src/Utility/Text.php
CakePHP3
CakePHP3 Controller/AppController subclasses in between
CakePHP3
CakePHP3 Model/Entity subclasses in between
CakePHP3
Knowing your table name in CakePHP3 Model/Entity. and the code to set the maximum value of the field
CakePHP3
Creating a theme with CakePHP3