How to Configure SMTP on wordpress Cant Send Email

You didn’t say what the problem is. You certainly should be able to send email using PHP mail or plugins from wordpress. Is it a security problem? Your password being rejected at authentication? Try using OAuth 2.0. https://wordpress.org/plugins/postman-smtp/ Is it a firewall problem? Are all the SMTP ports blocked? Try sending with an HTTPS API … Read more

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required?

I have the same problem. I have found this solution: Google may block sign in attempts from some apps or devices that do not use modern security standards. Since these apps and devices are easier to break into, blocking them helps keep your account safer. Some examples of apps that do not support the latest … Read more

SmtpException: Unable to read data from the transport connection: net_io_connectionclosed

EDIT: Super Redux Version Try port 587 instead of 465. Port 465 is technically deprecated. After a bunch of packet sniffing I figured it out. First, here’s the short answer: The .NET SmtpClient only supports encryption via STARTTLS. If the EnableSsl flag is set, the server must respond to EHLO with a STARTTLS, otherwise it will throw an exception. See … Read more

What is the difference between ports 465 and 587?

SMTP protocol: smtps (port 465) v. msa (port 587) Ports 465 and 587 are intended for email client to email server communication – sending out email using SMTP protocol. Port 465 is for smtpsSSL encryption is started automatically before any SMTP level communication. Port 587 is for msaIt is almost like standard SMTP port. MSA should accept email after authentication (e.g. after SMTP … Read more