Error reading SMTP packet; response to RCPT TO command expected
Has anyone come across this error message,
Error reading SMTP packet; response to RCPT TO command expected
They can write to me and I can send them email from a different account (gmail) but not from my main account. They're using microsoft exchange.
Thank you,
G5 PowerMac 2 GHz, MacBook 2GHz Intel Core 2 Duo, Mac OS X (10.4.11), iPods, airports, problems etc.