Port 587 mail

Port 587 is a common alternative to port 25 for sending email using a mail client or a script. Here's what you need to know:

What is port 587?

Port 587 is a Transmission Control Protocol (TCP) port used for sending email messages. It's also known as the "submission" port, as it's used by mail clients and scripts to submit email messages to a mail server.

Why use port 587 instead of port 25?

Port 25 is the traditional port used for sending email, but it's often blocked by internet service providers (ISPs) and firewalls to prevent spamming and other malicious activities. Port 587, on the other hand, is designed specifically for sending email from a mail client or script, and it's less likely to be blocked.

How to use port 587 for sending email

To use port 587 for sending email, you'll need to configure your mail client or script to use this port instead of port 25. Here are some general steps:

  1. Check your email provider's settings: First, check with your email provider to see if they recommend using port 587 instead of port 25. They may have specific settings or requirements for using this port.
  2. Configure your mail client: If you're using a mail client like Microsoft Outlook, Mozilla Thunderbird, or Apple Mail, you'll need to configure it to use port 587. This usually involves setting the "SMTP" or "Outgoing Mail" server to use port 587.
  3. Use a script or programming language: If you're using a script or programming language like Python, PHP, or Ruby to send email, you'll need to configure the script to use port 587. This usually involves setting the SMTP server to use port 587.

Common issues with port 587

Here are some common issues you might encounter when using port 587: