Email marketing can indirectly benefit SEO in a few ways:

(1) Increased Website Traffic: Sending promotional emails with links to your website can drive traffic to your site, which can improve your search engine rankings over time.
(2) Social Shares: Encouraging your email subscribers to share your content on social media can increase your social media presence and improve your visibility in search engine results.
(3) Brand Awareness: Regularly sending emails to your subscribers can help build brand awareness and recognition, which can lead to increased searches for your brand on search engines.
(4) Quality Content: Email marketing is an excellent way to share high-quality content, such as blog posts or infographics, which can be shared on social media and linked to by other websites, improving your website's authority and relevance.
To maximize the SEO benefits of email marketing, consider the following tips:

(1) Optimize your email content for SEO by including relevant keywords in your subject lines, headlines, and body text.
(2) Use a clear and concise call-to-action (CTA) in your emails to encourage subscribers to visit your website and engage with your content.
(3) Segment your email list based on interests and behavior to provide targeted content and promotions to your subscribers.
(4) Monitor your email and website analytics to track the impact of your email campaigns on website traffic and engagement.
(5) Include social sharing buttons in your emails to encourage subscribers to share your content on social media.

I agree with everything you said except for optimizing email content with relevant keywords in subject lines, etc.

Email is not the same as your website. Email subject lines should be optimized to encourage users to open the email and catch their attention as they skim. Because email never gets crawled by search engine bots, there's no advantage to being keyword-rich and that sort of thing.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.