Just curious, could the error below result from sending mail to an account that no longer exists, or does it have to do with the fact that I don't use RCPT on my server? (My server requires authentication before sending.) Or could there be some other reason? (If so, some sugguestions on what the reasons may be would be appreciated.) I turned off/don't use RCPT verification due to the added traffic it generates and comments I've seen before suggesting that it not be used. Code: <[email protected]>: host mail.otherdomain.com[WW.XX.YY.ZZ] said: 550 5.4.1 [[email protected]]: Recipient address rejected: Access denied (in reply to RCPT TO command) Cheers, Nap