I have 3 RPi using OpenSMTPD. These 3 RPi's are only outgoing boxes (system messages), they don't receive email, nor do they have MX records.
The Pi's are named NAS, Joe and Beta. They are all on distinct and non-connected networks. They were all sending email to McQ, a Postfix mail server on port 587 (Fedora 42). The other day, NAS just stopped sending email. The IP isn't blocked (at either the Pi or McQ). I can traceroute to McQ. I tried nc, telnet and open_ssl to attempt connecting on port 587, and they all failed from NAS to McQ. However, they did work on Joe and Beta to McQ. The credentials didn't change. The conf file, except for the name of the server are identical. Any ideas? Thank you. Regards, Wayne Wayne Spivak SBA.NET.WEB a division of SBA * Consulting, LTD 2711 Bellmore Avenue, Bellmore, New York 11710-4319 Tel NY: +1 (516) 221-3306 Tel NY: +1 (212) 487-5085 Tel CT: +1 (860) 760-0250 Fax: +1 (516) 204-1911 <mailto:wspi...@sbanetweb.com> mailto:wspi...@sbanetweb.com <http://www.sbaconsulting.com/> http://www.SBAConsulting.com LinkedIn: <http://linkedin.com/in/WayneSpivak> http://LinkedIn.com/in/WayneSpivak Twitter: @SBAConsult Skype: SBAConsult Schedule a brief meeting: <https://calendly.com/sbaconsulting/let-us-talk> https://calendly.com/sbaconsulting/let-us-talk
