If you encounter an error sending SMTP – no valid recipient specified, these instructions will help you. Error 1 is an SMTP error “No Actual Recipients”. This can happen if you misspell the recipient addresses, but it can also happen if you haven’t verified the outgoing server correctly. So the tricky part is that abc. xy is not a registered domain, so you cannot send email to that address.
Note: unfortunately, there are no duplicates, I have already seen everything that is written there.
I tried to connect to my mail server and
Laravel / Swiftmailer . The download section of my .env file looks like this:
MAIL_DRIVER = smtpMAIL_HOST =
MAIL_PORT = 465MAIL_USERNAME = MAIL_PASSWORD = MAIL_CRYPTION = ssl
Personal data is indeed censored for obvious reasons, but the setting works. I tested it by connecting to a server with this Thunderbird installation and it works fine.
public function from_id (string $ id): user ... ... ... Mail :: to (
) -> send (new command () sent);
This is how the mailbox looks likedrawer (this is basically the situation in the first paragraph of the Laravel docs):
public service version () return $ this-> view ('email_templates.simple_test');
I debugged the standard and there are actually two separate exceptions, but oops! only displays the last:
Expected response with code 250/251/252, but received code with “554”, message “554 5.7.1. Recipient Address Denied: Access Rejected “
Expected program response 354, but received code “554” with representation “554 5.5.1”. Error: no valid recipient “
I used to send an email from the current working mail server in Thunderbird via
When you try to send an email and use the SMTP client component or SocketTools archives, the connection is successful, but the SendMessage method or SmtpSendMes functionsage fails with an error indicating that no valid client was specified.
This is an error that will be displayed with the new 12296 error code returned by the LastError function in the .NET class or ActiveX wizard. If you are using the Library Edition API or if error code 0x80043008 is indeed returned by the SmtpGetLastError function.
The error corresponds to the SMTP 554 status code, often also contains an extended status code and similar message:
If you have verified the recipient’s address and determined that it is valid, here are some of the most likely causes of this error:
The local computer from which you are sending the message is unreliable. This often happens when each of our mail servers is on a local network, or it might be a private corporate network and you are trying to forward a message to someone else on that network. By default, most mail machines are configured to trust only user systems (usually those on the nearest subnet).
If the mail server does not trust the local system, you may need toserver authentication. Many mail hosting servers are configured with very limited trust, and only connections originating from the server, which itself must authenticate client connections, are trusted.
If you are connecting to a server on port 25 or prt 465, the recipient must be local to that particular server. Unless you explicitly confirm this on the mail server, the message will usually be rejected if the recipient cannot be localized (for example,
Mail servers that accept any recipient email address and automatically forward non-local emails are called open relays, which is now commonly considered a configuration error. Open relays are often misused to send unsolicited email messages, and all modern mail server configurations rule out this by default.
If you are connecting to the server on port 587 (often referred to as the “send” port), authentication is certainly not required. You must inCall a valid method if you are using a .Class network, or perhaps an ActiveX control, or the SmtpAuthenticate function is the actual event you are using with the library API. In almost all cases today, connections to these servers must be secured using TLS 1.2 (or higher).
Most servers will not even allow new clients to try to authenticate unless they are already using a secure connection. While there may be a rare exception to this rule, in contrast, most mail servers that now accept forwarding contacts on this port are designed to deny all recipients unauthenticated exclusive client sessions.
If you are connecting to the server using a non-standard port number, most of which are 2525, you generally need to follow the same instructions as for port 587. You must confirm the client and the session should be secure.
These non-standard ports are often designed to allow customers to bypass factors when an Internet Service Provider (ISP) canIt offers standard blocked ports. This is often done to prevent, or at least prevent, the misuse of specific networks by malware.
Make sure you are using the correct port number, usually a 587 connection. Always use a secure connection, so authenticate your session client with a legitimate username and password (or OAuth 2.0 token). If these steps are followed, our server should accept the recipient and deliver your message to you.
This article applies to SocketTools 10 and later components. SocketTools 9 and earlier will act as a supported protocol for secure connections using TLS 1.0, which could result in the merge attempt being rejected by some modern mail servers.
By default, the current version of SocketTools only uses TLS 1.2 (or higher) when establishing a secure connection. If someone’s application connects to a legacy outgoing mail server that supportsIt only supports TLS 1.0, you can specify it using the match parameter.
OAuth 2.0 support is only available in the current version of SocketTools. This authorization option is not available in the previous options.
Mail Server Authentication Error
Invalid or Unsupported Protocol
Testing Secure Authentication Connections Using OpenSSL
The security context could not be set
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