Actually even though it is gmail, it comes from a business account so the email address is not in the address. It is like this: Company@tstt.net.tt. TSTT is a telecoms company here and they have some arrangement with gmail to host the email.



>Don't use GMail. External mail services is cheap. And frankly, if I got email from a company that was sent from a gmail account, I'd ignore it.
>
>
>>Hi,
>>
>>I have an application for a client that sends out notification emails on a daily basis, sometimes amounting to over 1,000 emails. Every now and then they get an error:
>>
>>"System.Net.Mail.SmtpException: Mailbox unavailable. The server response was: 5.4.5 Daily sending quota exceeded"
>>
>>They have 8 gmail addresses that I loop through in order to send the emails.
>>
>>The code I use to send the emails is like this:
>>
>>

SmtpClient client = new SmtpClient(smtpClient, smtpPortInt);
>>// then build up the email details and
>>client.Send(msg);

>>
>>I have been unable to determine what exactly are the limits that gmail puts on sending email like this.
>>
>>One page says 500 per 24 hours if using the web interface, 100 for IMAP/POP.
>>
>>Other places I have seen 200 per hour.
>>
>>Does anyone have the real figures and any suggestions how to get around this problem?