If you get a socket error 10060 then outgoing port 25 is being blocked. So there you are, sending an email and it will just not go. What’s happened? I tell you what’s happened, your ISP has just flicked a switch and blocked you on port 25. Give them a call/email/chat and tell them, they will hopefully come back to you within the hour to tell you “it’s our policy to block port 25” but they’ve now enabled it for you. Oh,Â thankyou,Â thankyou,Â thankyou. Somewhere a toilet flushes.