Contact person: Multi-SMTP Integration For PHP

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Location: Bengaluru, India

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"I already have a PHP-based email verification module that relies on the open-SMTP verification method. The next step is to make this system more resilient by adding support for several outbound servers rather than a single host. The main environment will remain PHP; libraries such as PHPMailer or SwiftMailer can be used if they help speed development.

The key requirement is to plug in my own PMTA SMTP instances and allow them to authenticate with the usual username-and-password credentials. Once complete, the code should let me define multiple servers, select one at runtime, and automatically fall back to another if a connection fails or throttling limits are reached. A clean configuration file or database table that makes it easy to add or disable hosts without touching source code is essential.

Deliverables
• Updated PHP classes or functions that accept an array of SMTP hosts and cycle through them intelligently
• Sample config (or migration script) showing host, port, user, pass, and priority/order fields
• Brief README outlining setup steps and any new Composer dependencies
• Proof it works: a simple CLI or web form that verifies an address through each configured server and reports the result

Acceptance criteria
1. I can add at least three PMTA SMTP endpoints, each with its own credentials for email verification modules which are already running
2. Verification proceeds through the first server and moves on only if a soft/hard failure occurs.
3. No plain-text credentials appear in the repo; use environment variables or a separate, ignored config file.
4. PHP 8.2+ compatible and PSR-12-compliant code.


This is a focused task: solid, well-commented code and concise setup notes will be enough for sign-off." (client-provided description)