The Seo Tool

SEO Report for: linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server

Overview

Report generated on 2025-10-30 at 17:24:13 (UTC +00:00).

2 years ago

100

Run Email Server on Rocky Linux 9/Alma Linux 9 - Postfix SMTP Server

This is the best tutorial series on building email server on Rocky Linux 9/Alma Linux 9 from scratch on the Internet. Not only will you have a working email server, but also you will have a much better understanding about how email works.

https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server

1 high issue

2.8%

6 medium issues

16.7%

4 low issues

11.1%

25 tests passed

69.4%

0.17 seconds

30.88 kB

46 resources

Secure

SEO

Title

The title tag should be between 1 and 60 characters.

The current title has 68 characters.

The title tag is the HTML element that specifies the title of the webpage. The title tag is displayed at the top of your browser, in the search results, as well as in the bookmarks bar.

Learn more

Google

Meta description

The description tag should be between 70 and 160 characters.

The current description has 238 characters.

The meta description is an HTML tag that provides a short and accurate summary of the webpage. The meta description is used by search engines to identify a webpage's topic and provide relevant search results.

Learn more

Google

Canonical

The meta canonical tag is good.

https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server

The canonical tag defines the preferred URL for the current document, which helps search engines reduce duplicate content.

Learn more

Google

Headings

The headings are properly set.

Run Email Server on Rocky Linux 9/Alma Linux 9 – Postfix SMTP Server

LinuxBabe
About Postfix
Step 1: Choosing the Right Hosting Provider
Step 2: Configure Your Hostname and DNS Records
Step 3: Enable SELinux
Step 4: Installing Postfix
Step 5: Configuring Postfix
Step 6: Open TCP Port 25 (inbound) in Firewall
Step 7: Checking If Port 25 (outbound) is blocked
Step 8: Sending Test Email
Still Can’t Send Email?
Step 9: Using the mail program to Send and Read Email On the Command Line
Step 10: How To Increase Attachment Size Limit
Step 11: Creating Email Alias
Step 12: Using IPv4 Only
Step 13: Postfix Automatic Restart
Next Step

Set A Correct Hostname for Rocky Linux 9/Alma Linux 9 Server
Create DNS Records for Your Mail Server
Listening on the public IP address
Setting the Postfix hostname
Setting $mydomain Parameter
Setting $myorigin Parameter
Setting $mydestination Parameter
Restarting Postfix
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MX record
A record
AAAA record
PTR record

The h tags represents the headings of the webpage. The h1 tag is the most important h tag, and describes the main topic of the page, while the rest of the tags describe the sub-topics of the webpage.

Learn more

Mozilla

Content keywords

The content has relevant keywords.

run email server on rocky linux 9 alma linux 9 postfix smtp server

The webpage's content should contain relevant keywords that can also be found in the title of the webpage.

Image keywords

There are 3 images with missing alt attributes.

Images

The alt attribute specifies an alternate text for an image, if the image cannot be displayed. The alt attribute is also useful for search engines to identify the subject of the image, and helps screen readers describe the image.

Learn more

Google

SEO friendly URL

The URL is SEO friendly.

https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server

The SEO friendly URLs are URLs that contain relevant keywords with the webpage's topic, and contain no special characters besides slashes and dashes.

Learn more

Google

404 page

The website has 404 error pages.

https://www.linuxbabe.com/404-d88b8a632d94209858fd3553abb2e0a4

The 404 webpage status inform the users and the search engines that a page is missing.

Learn more

Bing

Robots.txt

The webpage can be accessed by search engines.

A robots.txt file inform the search engines which links from the website can be accessed.

Learn more

Bing

Google

Noindex

The webpage does not have a noindex tag set.

The noindex tag instruct the search engines to not index the webpage.

Learn more

Bing

Google

In-page links

The number of links on the webpage is okay.

Internals

Externals

The in-page links should be kept at a minimum, to avoid issues with search engines not being able to crawl additional links from the webpage.

Language

The webpage has the language declared.

en-US

The lang attribute declares the webpage's language, helping search engines identify the language in which the content is written, and browsers to offer translation suggestions.

Learn more

Mozilla

Favicon

The webpage has a favicon.

https://www.linuxbabe.com/wp-content/uploads/2021/08/cropped-linuxbabe-logo-180x180.png

The favicon is the icon that is being displayed in the browser's tab, when the webpage is being bookmarked, and sometimes even in search engine results.

Learn more

Google

Performance

Text compression

The HTML file is compressed.

The HTML filesize is 30.88 kB.

The text compression helps speeding up the webpage's load by compressing the HTML's content.

Learn more

Gzip

Brotli

Google

Load time

The webpage loaded in 0.17 seconds.

The load time indicates the HTML's total load time, and does not include the external resources, such as images, scripts, or other resources.

Page size

The size of the HTML webpage is 30.88 kB.

The page size indicates the HTML's total size, and does not include the external resources, such as images, scripts, or other resources.

HTTP requests

There are fewer than 46 HTTP requests on the webpage.

JavaScripts

CSS

Images

The HTTP requests represents the number of external resources present on the webpage.

Image format

There are 8 images that are not using the AVIF, WebP format.

Images

The images format represents the images that are not served in a next-generation file format. Images served in a next-generation format improve the webpage's load performance.

Learn more

Google

JavaScript defer

There are 18 javascript resources without the defer attribute.

JavaScripts

The defer attribute allows the browser to download the scripts in parallel and execute them after the webpage has been parsed, improving the webpage's load performance.

Learn more

Google

DOM size

The DOM size is optimal.

The HTML file has 1013 DOM nodes.

The DOM size indicates the number of nodes the HTML webpage has.

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Google

Security

HTTPS encryption

The webpage uses HTTPS encryption.

The HTTPS encryption helps protecting the user's security and privacy.

Learn more

Google

HTTP security

HTTP security not good now. Read detail to know how to protect your site.

Content-Security-Policy

Strict-Transport-Security

max-age=31536000; includeSubDomains; preload

X-Content-Type-Options

nosniff

X-Frame-Options

X-XSS-Protection

X-Permitted-Cross-Domain-Policies

X-DNS-Prefetch-Control

Cross-Origin-Embedder-Policy

Cross-Origin-Opener-Policy

Cross-Origin-Resource-Policy

Access-Control-Allow-Origin

HTTP security are a subset of HTTP headers that is related specifically to security. They are exchanged between a client (usually a web browser) and a server to specify the security details of HTTP communication.

Learn more

Mozilla

Mixed content

There are no mixed content resources on the webpage.

The mixed content is the content that is loaded over the HTTP connection while the webpage itself was loaded over HTTPS connection.

Learn more

Mozilla

Google

Server signature

The webpage has a public server signature.

cloudflare

The server signature is the public identity of a web server which contains information that could be used to exploit known vulnerabilities.

Learn more

nginx

Apache

Unsafe cross-origin links

The webpage has 4 unsafe cross-origin links.

Links

The unsafe cross-origin links indicates the external links that open in a new tab which can expose your website to performance and security issues.

Learn more

Google

Plaintext email

The webpage does not contain any plaintext emails.

Email addresses posted in public are likely to be fetched by crawlers and then collected in lists used for spam.

Miscellaneous

Code Quality

New generation websites should not use table tags.

<table class="yasr-widget-recent-ratings-table" >

Using the right code in the right situation ensures the site will render correctly across a wide range of devices. Incorrect code can result in worse search engines rankings and a bad user experience.

Structured data

The webpage has structured data.

Open Graph

og:locale en_US
og:type article
og:title Run Email Server on Rocky Linux 9/Alma Linux 9 - Postfix SMTP Server
og:description This is the best tutorial series on building email server on Rocky Linux 9/Alma Linux 9 from scratch on the Internet. Not only will you have a working email server, but also you will have a much better understanding about how email works.
og:url https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server
og:site_name LinuxBabe
og:image https://www.linuxbabe.com/wp-content/uploads/2020/01/Run-Your-Own-Email-Server-on-CentOS-–-Postfix-SMTP-Server.jpg
og:image:width 640
og:image:height 334
og:image:type image/jpeg

Twitter

twitter:card summary_large_image
twitter:creator @linuxbabe
twitter:site @linuxbabe
twitter:label1 Written by
twitter:data1 Xiao Guoan (Admin)
twitter:label2 Est. reading time
twitter:data2 20 minutes

Schema.org

@context https://schema.org
@graph
- 0
  - @type WebPage
  - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server
  - url https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server
  - name Run Email Server on Rocky Linux 9/Alma Linux 9 - Postfix SMTP Server
  - isPartOf
    - @id https://www.linuxbabe.com/#website
  - primaryImageOfPage
    - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server#primaryimage
  - image
    - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server#primaryimage
  - thumbnailUrl https://www.linuxbabe.com/wp-content/uploads/2020/01/Run-Your-Own-Email-Server-on-CentOS-–-Postfix-SMTP-Server.jpg
  - datePublished 2022-09-04T08:59:03+00:00
  - dateModified 2022-09-04T09:36:01+00:00
  - author
    - @id https://www.linuxbabe.com/#/schema/person/c9aa2c2f31b0e41654b74b6ed7fb0ba9
  - description This is the best tutorial series on building email server on Rocky Linux 9/Alma Linux 9 from scratch on the Internet. Not only will you have a working email server, but also you will have a much better understanding about how email works.
  - breadcrumb
    - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server#breadcrumb
  - inLanguage en-US
  - potentialAction
    - 0
      - @type ReadAction
      - target
        0 https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server
- 1
  - @type ImageObject
  - inLanguage en-US
  - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server#primaryimage
  - url https://www.linuxbabe.com/wp-content/uploads/2020/01/Run-Your-Own-Email-Server-on-CentOS-–-Postfix-SMTP-Server.jpg
  - contentUrl https://www.linuxbabe.com/wp-content/uploads/2020/01/Run-Your-Own-Email-Server-on-CentOS-–-Postfix-SMTP-Server.jpg
  - width 640
  - height 334
  - caption Run Your Own Email Server on CentOS – Postfix SMTP Server
- 2
  - @type BreadcrumbList
  - @id https://www.linuxbabe.com/redhat/run-email-server-on-rocky-linux-9-alma-linux-9-postfix-smtp-server#breadcrumb
  - itemListElement
    - 0
      - @type ListItem
      - position 1
      - name Home
      - item https://www.linuxbabe.com/
    - 1
      - @type ListItem
      - position 2
      - name Run Email Server on Rocky Linux 9/Alma Linux 9 – Postfix SMTP Server
- 3
  - @type WebSite
  - @id https://www.linuxbabe.com/#website
  - url https://www.linuxbabe.com/
  - name LinuxBabe
  - description Read The Friendly Manual | Linux Sysadmin, Server & Desktop
  - potentialAction
    - 0
      - @type SearchAction
      - target
        @type EntryPoint
        urlTemplate https://www.linuxbabe.com/?s={search_term_string}
      - query-input required name=search_term_string
  - inLanguage en-US
- 4
  - @type Person
  - @id https://www.linuxbabe.com/#/schema/person/c9aa2c2f31b0e41654b74b6ed7fb0ba9
  - name Xiao Guoan (Admin)
  - image
    - @type ImageObject
    - inLanguage en-US
    - @id https://www.linuxbabe.com/#/schema/person/image/
    - url https://secure.gravatar.com/avatar/42e9cbb39d606a2cf089d69b84846f6c?s=96&d=https%3A%2F%2Fwww.linuxbabe.com%2Fwp-content%2Fuploads%2F2018%2F06%2Flinuxbabe-comment-avatar-120x120.png&r=g
    - contentUrl https://secure.gravatar.com/avatar/42e9cbb39d606a2cf089d69b84846f6c?s=96&d=https%3A%2F%2Fwww.linuxbabe.com%2Fwp-content%2Fuploads%2F2018%2F06%2Flinuxbabe-comment-avatar-120x120.png&r=g
    - caption Xiao Guoan (Admin)
  - description If my answer helped you, please consider supporting this site.
  - sameAs
    - 0 https://twitter.com/linuxbabe
  - url https://www.linuxbabe.com/author/xiao-guoan

The structured data tags help the search engines better understand the content of the webpage, and allows them to create rich snippets in search results.

Learn more

Twitter

Schema.org

Open Graph

Bing

Google

Meta viewport

The webpage has a meta viewport tag set.

width=device-width, initial-scale=1.0

The meta viewport tag instruct the browsers how to render the viewport of the webpage.

Learn more

Mozilla

Google

Character set

The webpage does not have a charset declared.

The meta charset tag specifies the character encoding, helping the browsers to better render the characters and symbols on the webpage.

Learn more

Mozilla

Sitemap

The website has sitemaps.

Sitemaps

https://www.linuxbabe.com/sitemap.xml

Sitemaps inform search engines about pages available for crawling on the website.

Learn more

Bing

Google

Social

The webpage has 4 social links.

Facebook

Twitter

Social media presence is becoming increasingly important as a ranking factor for search engines to validate a website's trustworthiness and authority.

Content length

The webpage has 5,560 words.

The content length represents the number of words found on the webpage. The webpage should contain a decent amount of words.

Learn more

Google

Text to HTML ratio

The text to HTML ratio is 25%.

The text to HTML ratio represents the percentage of actual text compared to the percentage of HTML code on the webpage.

Inline CSS

The webpage contains inline CSS code.

Attributes

color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
color: #ff00ff;
text-align:left
display:none
display:none;
clear:both
display:none;
background-color : #3b5998; font-size: 26px; padding:9px
background-color : #1da1f2; font-size: 26px; padding:9px
background-color : #1e73be; font-size: 26px; padding:9px
background-color : #17377F; font-size: 26px; padding:9px
border:0;

The style attribute contains CSS style rules that are applied to the element. Inline CSS code unnecessarily increases the webpage's size, and can be moved in an external CSS file.

Learn more

Mozilla

Deprecated HTML

There are no deprecated HTML tags on the webpage.

The deprecated tags represents the tags that are not supported HTML5 standard anymore, and could cause the webpage to be rendered incorrectly.

Learn more

Tutorialspoint