Hello! I'm trying to send an email with SMTPClient. It always stop with timeout here (Data receive timed out): *waitForDataFor: timeout "Wait for the given nr of seconds for data to arrive. Signal a time out or connection close exception if either happens before data becomes available." ^self waitForDataFor: timeout ifClosed: [ConnectionClosed signal: 'Connection closed while waiting for data.'] ifTimedOut: [ConnectionTimedOut signal: 'Data receive timed out.']* Test code from the Playground is at the end. The server is Exchange. I've tested with bare hand telnet connection, it works well. I was able to create email through telnet and send it. But the SMTPClient in pharo always runs to timeout. Others: last message in SMTPClient ( firstLine := self stream nextLine. I saw in debugger) fetchNextResponse "The FTP and similar protocols allow multi-line responses. If the response is multi-line, the fourth character of the first line is a $- and the last line repeats the numeric code but the code is followed by a space." | response result firstLine | result := '' writeStream. * firstLine := self stream nextLine.* [.... *]* Last response from server: (lastResponse instance variable): *354 Start mail input; end with <CRLF>.<CRLF>* (copied from debugger) This is why I forced CRLF... at the end of the message.... It seems to wait a response after sending the data.... Is there any idea what else to check? Thanks: Robert ------------------------------------ Playground code (yes, port 26) *SMTPClient* deliverMailFrom: 'info@sender.hu' to: #(' laszlo.gombas@recipient.hu') text: ' To: <info@sender.hu> From: <laszlo.gombas@recipient.hu> Subject: this is a test Hello! ÃRVÃZTÅ°RÅ TÃKÃRFÃRÃGÃP ',Character cr asString,Character lf asString,'.' ,Character cr asString,Character lf asString usingServer: '10.0.0.31:26'.