Ask a Question

Error code "530 5.7.1 Client was not authenticated" sending email.

Occasional Contributor

Error code "530 5.7.1 Client was not authenticated" sending email.

I'm getting the erreur code "530 5.7.1 Client was not authenticated" when i try to send an email. I was working before but since IT has update the email server it stop working. They provide me with username and password to use in my code but it still does not work. Code:

function SendEmail(mFrom, mTo, mSubject, mBody, mAttach)
var i, schema, mConfig, mMessage;
try {
schema = "";
mConfig = Sys.OleObject("CDO.Configuration");
mConfig.Fields.Item(schema + "sendusing") = 2;
// cdoSendUsingPort 
mConfig.Fields.Item(schema + "smtpserver") = "ServerName"; // SMTP server
mConfig.Fields.Item(schema + "smtpserverport") = 25; // Port number
mConfig.Fields.Item(schema + "smtpauthenticate") = 0; // Authentication mechanism
mConfig.Fields.Item(schema + "sendusername") = Username; // User name (if needed)
mConfig.Fields.Item(schema + "sendpassword") = Password; // User password (if needed)
mConfig.Fields.Update(); mMessage = Sys.OleObject("CDO.Message"); mMessage.Configuration = mConfig; mMessage.From = mFrom; mMessage.To = mTo; mMessage.Subject = mSubject; mMessage.HTMLBody = mBody; if(mAttach != "") { aqString.ListSeparator = ","; for(i = 0; i < aqString.GetListLength(mAttach); i++) mMessage.AddAttachment(aqString.GetListItem(mAttach, i)); } mMessage.Send(); } catch (exception) { Log.Error("E-mail cannot be sent", exception.description); CollectGarbage(); return false; } Log.Message("Message to <" + mTo + "> was successfully sent"); CollectGarbage(); return true;


Best regards, Anastasios.

Community Manager

Re: Error code "530 5.7.1 Client was not authenticated" sending email.

Hi akalogeropoulos,


Judging by the error message, the client you are specifying in the code cannot get access to your mail server. I would recommend that you refer this question to your IT team to learn what was changed and how to fix this.

Tanya Yatskovskaya
SmartBear Community and Education Manager

Did my reply answer your question? Give Kudos or Accept it as a Solution to help others. ⬇️⬇️⬇️
Showing results for 
Search instead for 
Did you mean: