Web Reference: Jun 9, 2016 · I've been trying to get postfix setup so that it can SEND (don't need it to receive) emails out to users on my website (such as account validation emails). I install postfix through mailutils (installs postfix along with other stuff). MailRoute uses postfix, along with countless other email providers and administrators. We're providing a list of possible response codes you may see from our servers, or in our relay to other postfix servers. Jun 8, 2022 · Remove smtp_use_tls from your main.cf, and instead use smtp_tls_security_level = encrypt. The latter configuration applies a policy independently from the mechanism in use, affecting all outgoing SMTP, both TLS on port 465 (called tls_wrappermode by Postfix) and STARTTLS on port 587.
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