On 3/20/19 4:18 PM, Patrick Ben Koetter wrote:
Access providers may block outbound TCP/25 connections, because infected
enduser devices try to transport messages on that port to remote MTAs. They
won't block TCP/597 because submission requires SMTP AUTH, which requires the
sender to possess login/pass – something most spammers don't have.
On 20.03.19 16:26, Yassine Chaouche wrote:
Requiring authentication to relay on 25 will also get rid of spam.
it will also get rid of incoming mail from other mail servers...
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WinError #99999: Out of error messages.
