fix: modified IS_SMTP_CONFIGURED to only check for port and host

[Dhruwang]

What does this PR do?

Fixes #2713

How should this be tested?

Check emails

Checklist

Required

• [x] Filled out the "How to test" section in this PR
• [x] Read How we Code at Formbricks
• [x] Self-reviewed my own code
• [x] Commented on my code in hard-to-understand bits
• [x] Ran pnpm build
• [x] Checked for warnings, there are none
• [x] Removed all console.logs
• [x] Merged the latest changes from main onto my branch with git pull origin main
• [x] My changes don't cause any responsiveness issues
• [x] First PR at Formbricks? Please sign the CLA! Without it we wont be able to merge it 🙏

Appreciated

• [x] If a UI change was made: Added a screen recording or screenshots to this PR
• [x] Updated the Formbricks Docs if changes were necessary

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2 Ignored Deployments

| Name | Status | Preview | Comments | Updated (UTC) | | :--- | :----- | :------ | :------- | :------ | | **formbricks-cloud** | ⬜️ Ignored ([Inspect](https://vercel.com/formbricks/formbricks-cloud/9a2CZJ16Ys9kxrWBXyLVSVjAkVYG)) | | | Jun 6, 2024 1:30pm | | **formbricks-docs** | ⬜️ Ignored ([Inspect](https://vercel.com/formbricks/formbricks-docs/HPfxTCu7RQbMm2DMy6XcbZ11Qyde)) | | | Jun 6, 2024 1:30pm |

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