I've been getting the following exception when trying to send an e-mail using System.Net.Mail:
Unhandled exception in Service Thread:
System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: Requested action not taken: mailbox unavailable
at System.Net.Mail.DataStopCommand.CheckResponse(SmtpStatusCode statusCode, String serverResponse)
at System.Net.Mail.SmtpConnection.OnClose(Object sender, EventArgs args)
at System.Net.ClosableStream.Close()
at System.Net.Mail.MailWriter.Close()
at System.Net.Mail.SmtpClient.Send(MailMessage message)
Does anyone know what this could be caused by?
This is actually an error code returned by the server you're attempting to deliver to. Usually it means the email address you're attempting to deliver to is invalid, or their mailbox is full and isn't allowed to receive anymore mail.
Either way, this isn't a problem with your code, it needs to be resolved by the admin of the mail server. (I guess unless you chose to send the mail elsewhere)
I believe this just means that the recipient's mail server retuned the response "Mailbox unavailable" i.e. the address does not exist or something along those lines.
The SMTP server is returning an error saying Requested action not taken: mailbox unavailable. Check with the SMTP server and make sure that email address can receive mail.
Related
I want to send email in RunBaseBatch, but I get error 0x80040211 (unknown).
I found in google that means:
The message could not be sent to the SMTP server.
The transport error code was %2. The server response was %1
public void SendReport(str email)
{
SysMailer sm = new SysMailer();
;
sm.quickSend("axmail#domain.eu", email, "Test", strfmt("body"));
}
This method is called in Run method. And if I copy this source code into job that works. Additionally in Run method I use,
permissionSet = new Set(Types::Class);
permissionSet.add(new InteropPermission(InteropKind::ClrInterop));
permissionSet.add(new InteropPermission(InteropKind::ComInterop));
permissionSet.add(new InteropPermission(InteropKind::DllInterop));
CodeAccessPermission::assertMultiple(permissionSet);
Because your email seems to work in a job (client side), your email settings in AX are not the issue.
This is most likely an authentication issue.
Take a look at this article, which describes what your are experiencing.
On the client side, your current windows user is used to authenticate with the SMTP server.
In batch, the emails are sent from the AOS. That means that the account used for authentication, is the account under which the AOS service runs.
Your mail server probably doesn't accept connections from everyone.
Take a look here on how this is achieved.
You'll have to allow the user that runs your AOS service, to authenticate to your mail server.
I tried to send the error report to my email account using the send error report option available in datapower XB62 appliance but i didn't receive any emails in spite of the action being successful in datapower.
I check the email SMTP settings and it was as follows :
SMTP Setting :
Server name: smtp.office365.com
Port: 587
Encryption method: TLS
In datapower the following details were used in send error report option :
SMTP Server : smtp.office365.com
Subject : TestReport
Email Address : XXXXX#YYY.com
Email Sender Address : ZZZZZ#YYY.com
The below message was displayed when i send the error report :
Send error report to 'XXXXX#YYY.com' using 'smtp.office365.com'?
i confirmed the action, i received a message Action completed successfully.
Still I didn't find anything in my mail box.
Please note that the report can be quite big so it might be size restrictions on your mail. Look in temp log directory of DataPower to find the size of the report.
I am testing my application with PayPal sandbox.
The URI I use for the transaction is https://sandbox.paypal.com/cgi-bin/webscr?cmd=_xclick.
In my return page I read the data from PayPal then I form a new string to send back with cmd = _notify-validate.
When I make a call to https://sandbox.paypal.com/cgi-bin/webscr I am getting error saying "The remote certificate is invalid according to the validation procedure."
I tried making a call to https://www.paypal.com/cgi-bin/webscr instead and it always return t "INVALID".
This appears to be an SSL issue: This error message is caused because the process is not being able to validate the Server Certificate supplied by the Server during an HTTPS (SSL) request. The very first troubleshooting step should be to see if the server supplied certificate and every certificate in the chain is trouble free.
I want to check whether an SMTP mailbox is available for a given username and password. I am using the SmtpClient.Send method to send the email, but before sending it I want to check the whether the credentials provided are correct and also to check whether the SMTP server is valid.
How can I do this from C#?
I don't think the API provides the equivalent of an "is valid" type of query. However, when you look at the documentation, it states that an SmtpException will be thrown if the send fails; two of the reasons for failure include what you were looking for
invalid server (i.e. you couldn't connect with the SMTP protocol)
authentication failed (i.e. invalid username and password)
So handling that exception and inspecting it for whether the failure was indeed due to an authentication failure or a server connection failure should provide you with what you need.
Is there a way to check if SmtpClient successfully delivered an email? SmtpClient.Send() does not appear to return anything other than an exception. So if the method completes is it safe to assume the email will be successfully sent to the appropriate email box? My code is below:
MailMessage emailMessage = new MailMessage();
emailMessage.Subject = SubjectText;
emailMessage.IsBodyHtml = IsBodyHtml;
emailMessage.Body = BodyText;
emailMessage.From = new MailAddress(Settings.Default.FromEmail,Settings.Default.FromDisplayName);
//add recipients
foreach (string recipientAddress in RecipientAddresses.Split(new char[{','},StringSplitOptions.RemoveEmptyEntries))
emailMessage.To.Add(recipientAddress);
using (SmtpClient smtpClient = new SmtpClient())
{
smtpClient.Send(emailMessage);
}
No, there is no reliable way to find out if a message was indeed delivered.
Doing so will require access to the end SMTP server for every person you are emailing.
If you do not get an exception, you can assume that the SMTP server did its best to deliver the email.
There's no way to be 100% sure that a mail message has been received when sent via SmtpClient due to the way email works. The fact that SmtpClient doesn't throw an exception essentially means that you've done everything right, but a failure can happen further down the line, for example:
The receiving mail server could reject the mail
An intermediate mail server could reject the mail
The server that SmtpClient is transmitting mail through could decide to refuse to transmit the mail
One solution you could use is to create an httphandler for your website images. If you send an HTML message which includes at least 1 image, then you could embed querystring data to the end of that image. This could even be something like a 1x1 transparent image. When the user reads the email, this sends the request to the server to fetch the image data, and in turn, you could capture that request and denote that the message was read.
This is not bulletproof however, because most email clients block images by default unless the user specifies they would like to view images in the email.
If the recipient e-mail address is valid you don't get an immediate return value about the successful delivery of the message; see the signature:
public void Send(MailMessage message)
The SMTP server will notify the sender (or whoever you specify for the notification) almost immediately with an 'Undeliverable' notification whenever the recipient e-mail address is invalid/fake.
SMTP servers are required to periodically retry delivery. When the recipient e-mail address is a valid address but for some reason the SMTP server could not deliver the message, the SMTP server will return a failure message to the sender if it cannot deliver the message after a certain period of time.
RFC 2821 contains more details.
From section 2.1 Basic Structure
In other words, message transfer can occur in a single connection
between the original SMTP-sender and the final SMTP-recipient, or can
occur in a series of hops through intermediary systems. In either
case, a formal handoff of responsibility for the message occurs: the
protocol requires that a server accept responsibility for either
delivering a message or properly reporting the failure to do so.
See sections 4.5.4 and 4.5.5
From section 6.1 Reliable Delivery and Replies by Email
If there is a delivery failure after acceptance of a message, the
receiver-SMTP MUST formulate and mail a notification message. This
notification MUST be sent using a null ("<>") reverse path in the
envelope. The recipient of this notification MUST be the address from
the envelope return path (or the Return-Path: line).