Note ##########These email domains must have inboxing and a good inbox ratio. You need to advise what type of SMTP to use to send emails.########## I’m planning to build a bulk-email solution that can comfortably move between SMTP relays, modern API endpoints (SendGrid, Mailgun, etc.), and POP3/IMAP for incoming mail handling or bounce processing. The core objective is straightforward: push large volumes of messages quickly and reliably while keeping the option to read replies or pull bounce data without switching platforms. Here’s what I expect at a minimum: • A sending engine that lets me toggle between SMTP credentials, token-based APIs, and—where useful—POP3/IMAP workflows. • A clean UI or command-line wrapper where I can upload CSV lists, map fields, and trigger sends. • Basic deliverability safeguards (throttling, retry logic, SPF/DKIM friendly headers). • Source code handed over, with build/run instructions and a short read-me so I can deploy on my own server (Linux preferred). If you already have extras such as template editing, list-segment tools, or open/click analytics, let me know—they’re welcome but not essential for this first milestone. Acceptance criteria: 1. I can connect at least one working SMTP account, one REST-API sender, and one POP3/IMAP mailbox, send a test campaign, and view success/bounce feedback. 2. The app performs a 2,000-email batch in under 15 minutes on a modest VPS with no errors logged. 3. All configuration settings persist after restart. Feel free to recommend frameworks or libraries you trust (Python + Django/Flask, Node.js, Go—whatever suits the job) as long as installation remains straightforward. Important @yahoo.com @outlook.com @aol.com @icloud.com @mail.com @gmx.de @protonmail.com @zoho.com @gmail.com #These email domains must have inboxing and a good inbox ratio. You need to advise what type of SMTP to use to send emails. #software features list# # Sender Name # Email Subject Line Box # Delay second For {par mail sending speed} # Email Body Box # Email context Box Edit option OR Html Option ({Html to Image} -{Html to Inline}-{Html to Plain Text}) Input Bulk mail option (Only TEXT Document) # Clear button # Send Button # Stop Button # Tag list # Right site sending Monitoring option # Login system (Username & Password,------ After logging in with your username and password, activate the software with the activation code and the software will be activated for use.------A user will not be logged in to another device while logged in to one device. ) # There must be a panel for creating users.