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  1. DevOps

    Tutorial postfix connect to[...]:25: Network is unreachable

    There is a MySQL postfix database and all postfix config are generally in /etc/postfix. Most paths are stored in /etc/postfix/ edits and adds "inet_protocols = ipv4" if you don't have an inet_protocols line in inet_protocols = ipv4 Done:whistle:
  2. DevOps

    Tutorial Which SMTP Port Should I Use? Understanding Ports 25, 465, & 587

    It's a common question that we receive here at Mailgun about SMTP port numbers. To ensure connectivity to our Simple Mail Transfer Protocol (SMTP) endpoint, Mailgun offers multiple SMTP port options, but which one should you use to send email messages? We’ll take a historical look at each SMTP...
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