Exception of type 'System.OutOfMemoryException' was thrown.

Hi Support,

I am getting error while sending email without attachment. I am using Aspose.Email.dll, v6.9.0.0.  Below is the exception :

Inner exception: "Exception of type 'System.OutOfMemoryException' was thrown."

Stack Trace:
"   at Aspose.Email.Mail.SmtpClient.#=qXpJ35R2Kgz2MYmAGI$rjDA==(IConnection #=qDcF0lfo79WbpwdX1lX3y5w==, IEnumerable #=qPnntbmwKRLjjz1AteckEVQ==, EventHandler`1 #=qnVW_C0EsjJEndxMvtVDIh8ytS7zRWeDnHnShRAZbIgc=)
   at Aspose.Email.Mail.SmtpClient.Send(MailMessage message)"

I am sending email in iteration and after 100 or 200 items, smtpClient.Send(message); method throw out of memory exception.

Note:
1. Exception only came when memory cross 220 mb.
2. Object of Aspose.Email.Mail.SmtpClient class never release its memory.

Please suggest me what went wrong.