We frequently encounter questions such as, “Which port should I use?” or “Why the sudden need to switch ports when everything worked perfectly yesterday?” Admittedly, these questions aren’t straightforward to address. Why, you ask? Surprisingly, it’s not solely within the control of an external SMTP provider. Factors such as your Internet Service Provider (ISP), firewalls, and email client/software also play significant roles. Let’s delve into the world of ports – their commonality and the primary purposes they serve.
