On Fri, Nov 14, 2014, A. Schulze wrote: > Android-4.4.2 Mail
If you have a chance, can you contact the developers and ask them to fix it? > unknown[192.0.2.25]: MAIL FROM: <sender@local.****> > unknown[192.0.2.25]: RCPT TO: <receiver@external.*****> RFC 5321 explicitly lists this error (for those who have trouble understanding RFC 821 or RFC 2821): Since it has been a common source of errors, it is worth noting that spaces are not permitted on either side of the colon following FROM in the MAIL command or TO in the RCPT command. The syntax is exactly as given above.