https://mailfully.com/blog Notes from the Mailfully team on deliverability, transactional email APIs, and the unglamorous plumbing that keeps mail out of the spam folder. en-us https://mailfully.com/blog/digitalocean-blocks-smtp-ports-ses-2587 https://mailfully.com/blog/digitalocean-blocks-smtp-ports-ses-2587 Thu, 17 Sep 2026 20:24:05 GMT Our Ghost install on a DigitalOcean droplet couldn't send its own invites, and weeks with support went nowhere. Amazon SES also answers on port 2587, and one number in the config fixed it. https://mailfully.com/blog/send-transactional-mail-from-a-subdomain https://mailfully.com/blog/send-transactional-mail-from-a-subdomain Mon, 14 Sep 2026 15:03:47 GMT SPF doesn't cascade to subdomains, and every name carries exactly one record. Put those together and sending from your root domain leaves you one DNS edit away from breaking every email your company sends.