tcp - Linux not accepting connections to port 25 -



tcp - Linux not accepting connections to port 25 -

i working on simple smtp server, stuck on accepting tcp connections on port 25.

i tried running server , using telnet localhost , works. separate computer says trying (ip)...

when sending email's gmail smtp server not see connection

relevant code in golang

func main() { listener, err := net.listen("tcp", ":25") checkerror(err) { conn, err := listener.accept() checkerror(err) go handleconnection(conn) } }

it ubuntu server running on digital ocean

i know port 25 not beingness used , have file descriptors remaining

tried on different port , worked. seems digital ocean thing.

linux tcp go smtp

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