Sendmail [25: Connection refused] fix

If you can't receive email from the outside and got next error:

 (Delivery Status Notification [(0) []:25: Connection refused]).

You should check the iptables , is port listening .

if you can telnet on port 25 from localhost and can't from remote you need to modify your file. Just comment the next line:

# O DaemonPortOptions=Port=smtp,Addr=, Name=MTA


Save config and restart sendmail.



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