Can i use a non att server to upload mail

You're asking if you can use a non-Authenticating (non-Auth) server to upload mail.

In general, it's not recommended to use a non-Auth server to upload mail, especially if you're sending mail on behalf of your organization or using a mail client that requires authentication. Here's why:

  1. Security risks: Non-Auth servers don't require authentication, which means anyone can send mail using your server's IP address. This increases the risk of spamming, phishing, and other malicious activities.
  2. Delivery issues: Many mail servers, including those that use SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail), rely on authentication to verify the sender's identity. Without authentication, your mail may not be delivered or may be flagged as spam.
  3. Reputation damage: If you use a non-Auth server to send mail, your organization's email reputation may suffer. This can lead to delivery issues, spam filtering, and even blacklisting.

That being said, there are some scenarios where using a non-Auth server might be acceptable:

  1. Testing or development environments: If you're testing a mail client or developing a mail-related application, a non-Auth server might be sufficient.
  2. Small-scale, internal mail: If you're sending mail within a small, internal network or organization, and you're not concerned about security or authentication, a non-Auth server might be acceptable.

However, for most use cases, it's recommended to use an Auth server to upload mail. This ensures that your mail is properly authenticated, reducing the risk of security issues and improving delivery rates.

If you're looking for a simple, non-Auth server for testing or development purposes, you can consider using a public mail server like Mailgun or Sendgrid. These services offer free tiers and are designed for testing and development. However, keep in mind that these services may have limitations and restrictions on usage.