Error Message Too Many Invalid Recipients
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Too Many Invalid Recipients Outlook
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Too Many Invalid Recipients Ironport
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Too Many Invalid Recipients In Time Window
vote 0 down vote favorite Our application sends out emails using the new SmtpClient(smtpServer).Send(message); We are making sure that the smtpServer is valid, the message has To and From addresses, a subject and a body. If any of these are missing, we would log an exception before even attempting to send a message. But the application frequently fails with the below exception. Email Fail: System.Net.Mail.SmtpException: Mailbox unavailable. The remote host said: 550 too many invalid recipients server response was: Too many invalid recipients. Now, please note that the email send functionality is not failing always. For the same "To" address, it fails, may be about half the times. So, if the application tries sending out emails 100 times, we are getting some 40+ failures with the same message. I have already validated that the To address and the From address exists. We are seeing this issue since last month when we shifted from Outlook to Gmail. Here is the code. if (fromAddress.Length == 0) fromAddress = Resources.FromAddress; if (toAddress.Length == 0) return "To Address is Required."; if (smtpServer.Length == 0) smtpServer = Resources.SMTPServer; if (string.IsNullOrEmpty(smtpServer)) return "SMTP sever not specified"; MailMessage mailMessage = new MailMessage(); //set the addresses mailMessage.From = new MailAddress(fromAddress); string[] toAdds = toAddress.Split(';'); short i = 0; foreach (string address in toAdds) { if(i==0) mailMessage.To.Add(address); else mailMessage.CC.Add(address); i++; } if (!string.IsNullOrEmpty(bcc)) { string[] bccAddresses = bcc.Split(';'); foreach (string address in bccAddresses) { mailMessage.Bcc.Add(address); } } if (!string.IsNullOrEmpty(cc)) { string[] ccAddresses = cc.Split(';'); foreach (string address in ccAddresses) { mailMessage.CC.Add(address); } } if (subject.Length > 0) mailMessage.Subject = subject; mailMessage.Body = sBody; mailMessage.IsBodyHtml = true; SmtpClient emailClient = new SmtpClient(smtpServer); emailClient.Send(mailMessage); Any directions? c# .net smtp share|impr
Contact us Having Spam Issues? Go here for troubleshooting steps. 550 Too many invalid recipients This Help Center article is for Postini, 550 too many invalid recipients gmail a suite of Google services that's 451 too many invalid recipients now discontinued. If you're searching for instructions related to Google Apps, smtp 550 too many invalid recipients see the Google Apps Help Center. For instructions related to Google Apps Vault, see the Vault http://stackoverflow.com/questions/28029092/getting-a-mailbox-unavailable-too-many-invalid-recipients-error Help Center. Issue: Inbound email getting rejected with the error "550 Too many invalid recipients"Example:=======-bash-3.2$ telnet 123.45.6.7 25Trying 123.45.6.7...Connected toironport.domain.com(123.45.6.7).Escape character is '^]'.550 Too many invalid recipientsConnection closed by foreign host.RESOLUTIONThis error is because https://support.google.com/postini/answer/1753166?hl=en of DHAP prevention enabled on the ironport device and one of the solution is to disable the same using the procedure belowGo to Mail Policies > Mail Flow Policies and for all polices with an Accept behavior with the exception of Throttled, click on the policy and then under Mail Flow Limits > Directory Harvest Attack Prevention (DHAP), increase the value for Max. Invalid Recipients Per Hour or set it to Unlimited. Submit and commit the changes.ORwhitelist Postini ip ranges. See attached image for details.Postini ip ranges==============http://www.google.com/support/appsecurity/bin/answer.py?hl=en&answer=141669 Share this: Was this article helpful?YesNoSubmit ©2016 Google Privacy Policy Terms of Service
chef:Ansvarig för VIP-konto:Pro DashboardMina produkterKontoinställningarMina förnyelserLogga utLogga inMenyHjälpSystemstatusTillbaka|Start Fullständig webbplatsHjälpWorkspace EmailHjälpHosted ExchangeHjälpOffice 365 från GoDaddyGoDaddy HjälpWhat does my email bounceback mean?When a mail server cannot send or deliver an email, it generates a "bounceback" message that describes what happened, including the https://www.godaddy.com/help/what-does-my-email-bounceback-mean-3568 reason it failed. If you receive a bounceback message, you can cross http://productforums.google.com/d/topic/gmail/ta9SllD1ok8 reference its error code with the information below to find out what caused the issue and how to resolve it. These examples use the domain coolexample.com and its email address holly@ — you'll need to replace these with your own information. Here are the most common bounceback too many message errors: Recipient Account Related Bounces Invalid Recipient Bounces Sender Related Bounces Content Related Bounces Rate Limiting Bounces RBL Related Bounces Common Bouncebacks with Hosted Exchange Use Ctrl + F to find keywords. Common Bouncebacks with Email Bounceback Error Cause of Error Resolution 421 Server temporarily unavailable. Try again later. IB101 The email queue is experiencing higher than normal too many invalid email volume. Please try again later. Recipient Account Related Bounces Bounceback Error Cause of Error Resolution Account storage limit The recipients account has reached it's storage limit and cannot receive email at this time. The recipient needs to clear out the receiving folder to make room for more email. Account does not exist The email the sender sent to does not exist. Verify that the recipient email was entered correctly. Account disabled The recipient account exists but its ability to receive mail has been disabled. Typically these accounts remain permanently disabled, but you can try sending the email again later. Delivery timeout This could happen for possible reasons. Please try again later. Invalid Recipient Bounces Bounceback Error Cause of Error Resolution 550 Recipient not found. The recipient is not a valid email address. Remove the invalid recipient from your email. 451 Sorry, I wasn’t able to establish an SMTP connection. I’m not going to try again; this message has been in the queue too long. The recipient's email address has been misspelledOr the recipient's em
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