Answer by BillThor for SMTP server cannot email outside LAN
MX records are only required for incoming mail. For outgoing email you need an A record for the external IP address (outgoing from the firewall/NAT), and should have a corresponding PTR record pointing...
View ArticleAnswer by JdeBP for SMTP server cannot email outside LAN
Do I have to setup an MX record for our domain in order to run an SMTP server--all this is for is just emailing out? No. MX resource records are for the rest of the world to find your SMTP Relay...
View ArticleAnswer by sysadmin1138 for SMTP server cannot email outside LAN
Sounds like the remote side of the SMTP conversation is not even allowing a connection. To me that sounds like your firewall isn't allowing TCP/25 out of the network for the IP address of your new SMTP...
View ArticleSMTP server cannot email outside LAN
There are a lot of variables in my question, so I'll try to be as concise as possible:Objective: To setup a local SMTP server for our other servers to connect to a local IP address to mail out. We're...
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