SMTP Error 513 occurs when the recipient's email addresses are invalid or contain unsupported syntax. A common cause for this error is copying email addresses off websites and copying unsupported characters along with the selected text.

What are the cases covered in SMTP Error 513?

SMTP Error 513 in phpmailer Instances & Examples:

• Case 1: "513 5.1.1 recipient@example.com: Recipient address contains unsupported syntax."
• Case 2: "513 5.4.5 recipient@example.com: Invalid email address format detected."
• Case 3: "513 5.7.0 recipient@example.com: Recipient's email address is invalid."

SMTP Error 513 in Jenkins Instances & Examples:

• Case 1: "513 5.1.1 recipient@example.com: Recipient address contains unsupported syntax."
• Case 2: "513 5.4.5 recipient@example.com: Invalid email address format detected."
• Case 3: "513 5.7.0 recipient@example.com: Recipient's email address is invalid."

What’s Causing This SMTP Error 513 In Your Servers? (in pointers)

SMTP 513 error in phpmailer and Jenkins can occur due to:

• Invalid email address syntax: The recipient's email address contains unsupported characters or has an incorrect format.
• Copying unsupported characters: Copying email addresses from websites may inadvertently include unsupported characters or syntax.
• Unsupported email address format: The email address format does not adhere to standard conventions.

How to Resolve SMTP Error 513 - Step-by-Step Solution

To resolve this email smtp error 513 in phpmailer and Jenkins servers, follow these steps:

• Validate the recipient's email addresses: Ensure that the email addresses are correctly formatted and do not contain any unsupported characters or syntax.
• Avoid copying unsupported characters: When copying email addresses, ensure that only the valid email address without any additional characters is selected.
• Manually verify email addresses: If unsure about the validity of an email address, manually verify it with the recipient to ensure correctness and compatibility.
• By adhering to these steps, you can effectively resolve SMTP Error 513 in both phpmailer and Jenkins environments.

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