Sending SMTP mail via an Office 365 mail server, using .NET System.Net.Mail.SmtpClient I'm getting the following error:
The server response was: 4.3.21 Mailbox server busy; mail intentionally delayed
I can't find any reference to this specific code anywhere - the closest thing I can find is 4.3.2 mailbox busy
It seems to be a transient error, but I'm getting a lot of them.
Any idea what the code means?
Related
I have an exchange server 2016 and I've created a user, say testuser1#exchangedomain.com
I followed the steps as told in this video:
https://www.youtube.com/watch?v=GN2mZ6qOWf8
I'm trying to send a mail from testuser1#exchangedomain.com in the exchange server to any outlook account in the outside world, for example, username#outlookdomain.com
But I'm unable to send a mail from testuser1 and I'm receiving this error on the exchange server
Remote Server returned '550 5.1.10 RESOLVER.ADR.RecipientNotFound; Recipient not found by SMTP address lookup'
Is it even possible to do so because both the domains are completely different or am I missing something here?
The recipient email account is not found or doesnot exist. Even sending an email from Gmail gives "Address not found
Your message wasn't delivered to username#outlookdomain.com because the domain outlookdomain.com couldn't be found. Check for typos or unnecessary spaces and try again".
I have configured a new Exchange 2016 server and I use it to send emails over a self-written .net application, using the standard MailMessage and SmtpClient. Everything works fine about 90% of the time and then suddenly without any change (neither on the server, nor on the code) this error is returned:
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM
Then some time later (could be a minute or an hour) everything works fine again, without any change on either component. Any ideas what might be causing this?
I want to send email with and attachment using SSIS, and the below error occurs.
[Send Mail Task] Error: An error occurred with the following error
message: "The SMTP server requires a secure connection or the client
was not authenticated. The server response was: 5.5.1 Authentication
Required. Learn more at".
Below is my SMTP connection Manager and Send Mail Task, and the above error occurs..
Any help..
You need to provide authentication, GMail doesn't work as an open relay.
Also, you can't connect to GMail with Windows authentication, so you'll have to use a script component and do this in .Net if that has to be your mail server for this.
Here's someone who found & solved this already, even including the GMail part: http://kalyan-coldfusion.blogspot.co.uk/2012/04/send-email-with-ssisdatabase-from-gmail.html
Better luck with your Googling in future :)
When trying to send mail (to email addresses within the domain) using PHP's mail() function on my new Exchange 2010 server I get the error:
mail(): SMTP server response: 501 5.1.3 Invalid address
I tried creating a new receive connector with anonymous authentication but that doesn't seem to help, and honestly I have little to no experience with Exchange Server.
The address is valid, btw.
Try adding this on top:
ini_set("sendmail_from", "email#yourdomian.com");
It'll work
I have started to see an intermittant error when sending email via my application.
System.Net.Mail.SmtpException: Service not available, closing transmission channel. The server response was: 4.4.2 service timed out.
Now obviously it's timing out for some reason, but any ideas as to why this is happening now? This is the first time I've seen it happen.
Some things to check:
has anything on the server side changed? Did the admins add some kind of greylisting, perhaps?
what happens if you connect to the server directly via telnet on port 25?
does this occur from other applications, as well (e.g. your desktop E-mail client) ?