diff --git a/src/getRedirects.ts b/src/getRedirects.ts
index 9c8ba5b..d62f6e7 100644
--- a/src/getRedirects.ts
+++ b/src/getRedirects.ts
@@ -3,19 +3,43 @@ import type { Redirects } from '.'
 import { createRedirect } from './createRedirect.js'
 import { getMarkdownFrontmatter } from './utils.js'
 
+function isValidDomainRelativePath(path: string): boolean {
+  return !path.includes('://') && !path.includes(' ') && !path.includes('\n')
+}
+
 export async function getRedirects(
   files: string[],
   srcDir: string,
   getSlug: (filePath: string) => string,
-  command: 'dev' | 'build' | 'preview'
+  command: 'dev' | 'build' | 'preview',
+  logger: { warn: (msg: string) => void }
 ) {
   let redirects: Redirects = {}
 
   for (const file of files) {
     const frontmatter = await getMarkdownFrontmatter(path.join(srcDir, file))
-    const redirectFrom: string[] = frontmatter?.redirect_from
+    let redirectFrom: string[] = []
+
+    if (frontmatter?.redirect_from){
+      if (typeof frontmatter?.redirect_from === 'string') {
+        redirectFrom = [frontmatter.redirect_from]
+      } else if (Array.isArray(frontmatter?.redirect_from)) {
+        redirectFrom = frontmatter.redirect_from
+      } else {
+        logger.warn(`Unexpected type ${typeof frontmatter?.redirect_from} for redirect_from in file: ${file}`)
+      }
+    }
+
+    redirectFrom = redirectFrom.filter(redirect => {
+      if (isValidDomainRelativePath(redirect)) {
+        return true
+      }
+      logger.warn(`Invalid redirect path: ${redirect} in file: ${file}`)
+      return false
+    })
+
     const isExcluded = command === 'build' && frontmatter?.draft === true
-    if (!frontmatter || !redirectFrom || isExcluded) continue
+    if (!frontmatter || !redirectFrom.length || isExcluded) continue
 
     const postSlug = frontmatter.slug || getSlug(file)
     if (!postSlug) continue
diff --git a/src/index.ts b/src/index.ts
index f0bc05b..eaad926 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,4 +1,5 @@
 import path from 'node:path'
+import fs from 'node:fs'
 import type { AstroIntegration } from 'astro'
 import { getRedirects } from './getRedirects.js'
 import { getMarkdownFiles, getSlugFromFilePath, writeJson } from './utils.js'
@@ -36,7 +37,8 @@ export async function initPlugin(
       markdownFiles,
       _contentDirPath,
       _getSlug,
-      command
+      command,
+      logger
     )
     if (!redirects || !Object.keys(redirects).length) {
       logger.warn('No redirects found in markdown files')
@@ -45,6 +47,9 @@ export async function initPlugin(
 
     updateConfig({ redirects })
 
+    if (!fs.existsSync(config.cacheDir.pathname)) {
+      fs.mkdirSync(config.cacheDir.pathname, { recursive: true })
+    }
     const redirectFilePath = path.join(
       config.cacheDir.pathname, // Default is ./node_modules/.astro/
       'redirect_from.json'
diff --git a/test/__fixtures__/markdown/posts/hello-once.md b/test/__fixtures__/markdown/posts/hello-once.md
new file mode 100644
index 0000000..20370da
--- /dev/null
+++ b/test/__fixtures__/markdown/posts/hello-once.md
@@ -0,0 +1,3 @@
+---
+redirect_from: /hello-once
+---
diff --git a/test/redirects.test.ts b/test/redirects.test.ts
index 2093853..c2e51f5 100644
--- a/test/redirects.test.ts
+++ b/test/redirects.test.ts
@@ -3,6 +3,8 @@ import { createRedirect } from '../src/createRedirect'
 import { getRedirects } from '../src/getRedirects'
 import { getMarkdownFiles, getSlugFromFilePath } from '../src/utils'
 
+
+
 describe('getRedirects', async () => {
   // handling this more as an integration test
   const srcDir = './test/__fixtures__/markdown'
@@ -13,13 +15,15 @@ describe('getRedirects', async () => {
       files,
       srcDir,
       getSlugFromFilePath,
-      'build'
+      'build',
+      console
     )
     expect(result).toBeInstanceOf(Object)
     expect(result).toStrictEqual({
       '/hello-astro-old': '/hello-astroooooo',
       '/hello-astro-old-234837': '/hello-astroooooo',
       '/hello-world-old': '/posts/hello-world',
+      "/hello-once": "/posts/hello-once",
       '/hello-world-old-234837': '/posts/hello-world',
       '/hello-markdown-old': '/hello-markdown',
       '/hello-markdown-old-234837': '/hello-markdown'
diff --git a/test/utils.test.ts b/test/utils.test.ts
index b433bb9..337cb0c 100644
--- a/test/utils.test.ts
+++ b/test/utils.test.ts
@@ -12,7 +12,7 @@ describe('getMarkdownFiles', () => {
   it('should return an array of markdown files from the given directory', async () => {
     const files = await getMarkdownFiles('./test/__fixtures__/markdown')
     expect(files).toBeInstanceOf(Array)
-    expect(files).toHaveLength(4)
+    expect(files).toHaveLength(5)
   })
 })