problems configuring smtp adapter
I am trying out the send mail sample with the Biztalk 2004 sdk and I am trying to configure the smtp adapter with my gmail account. Once I do this and then send a message I get an error:
The adapter failed on an attempt to transmit a message going to send port with the address "mailto:firstname.lastname@example.org". Details: "The server rejected the sender address. The server response was: 530 5.7.0 Must issue a STARTTLS command first 28sm10645655fkx
Can anyone explain what I can do to fix this? or is there another smtp server I can use?