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Troubleshooting Email Validation and Submission Issues in Newsletter for WordPress

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Users of the 'Newsletter – Send awesome emails from WordPress' plugin sometimes encounter issues related to email address validation, form submission behavior, and security. This guide addresses the most common questions and provides solutions based on community discussions and official plugin responses.

Common Email Validation Quirks

The plugin's subscription form uses HTML5 validation by default. A known behavior, which some users may perceive as a bug, is that the form will accept an email address with a string following the '@' symbol, even if it's not a valid domain (e.g., 'sdfdfg@sdfdfg'). This is standard HTML5 behavior. The 'Newsletter – Send awesome emails from WordPress' team has acknowledged feedback on this and may address it in a future update. For stricter validation, consider using a custom validation script.

Case Sensitivity in Email Addresses

A user reported an issue with an email address that had an uppercase first character. According to email standards (RFC 5321), the local part of an email address (before the @) is case-sensitive, but in practice, most mail servers treat it as case-insensitive. The plugin itself does not distinguish between upper and lower case characters in email addresses, so this should not cause a problem for subscriptions.

Managing Form Submission and Redirects

By default, the plugin redirects users to a confirmation page after they submit the subscription form. Many users have requested the ability to show an AJAX confirmation message on the same page instead of a redirect. The 'Newsletter – Send awesome emails from WordPress' team has added this to their feature request list for future consideration. Currently, a redirect is the standard behavior.

Preventing Invalid and Malicious Sign-ups

To combat invalid email sign-ups (like 'gmail.it' or 'glail.com') or malicious subscriptions that could trigger SMTP server blocks, a two-step subscription process is highly recommended. This method requires a user to confirm their email address before being fully subscribed, which effectively filters out many invalid addresses. For additional protection against spam submissions, implementing a CAPTCHA is also advised.

Security Note: SMTP Password Field

An important security concern was raised regarding the plugin's SMTP settings panel, where the password was displayed in plain text instead of being hidden by asterisks. The 'Newsletter – Send awesome emails from WordPress' team has acknowledged this as a defect and added it to their list of issues to correct. Always ensure you log out of your WordPress admin when not in use to mitigate such security risks.

For more specific issues not covered here, reviewing the plugin's documentation or searching community forums can often provide additional insights.

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