Sender Dependent

Introduction to Outgoing IPs By default, when your mail server sends out email the SMTP connection will come from the system’s default IP address, typically that assigned to eth0 . Even if ...

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Preheader

You can insert invisible pre-header text into your emails so it won’t show up in the body of your message, but still be visible in the message preview. How to ...

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Postfix transport_map

transport_maps = hash:/etc/postfix/transport create /etc/postfix/transport in the format of domain.com smtp:smtp.mailchannels.netdomain2.com smtp:smtp.mailchannels.net add to main.cf: smtpd_sasl_authenticated_header = yes service postfix restart

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Postfix

Postfix slow down sending for some ESPs in  transport regex: /@.*hotmail\./ slow: /@.*live\./ slow: /@.*msn\./ slow: /@.*yahoo\./ slow: /@.*aol\./ slow: /@.*btinternet\./ slow: /@.*btopenworld\./ slow: /@.*talk21\./ slow: Block specific IP addresses ...

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CSF

Step 1: Go to Firewall Configuration (/etc/csf/csf.conf) and add these custom logs (they are at the end of the file): CUSTOM2_LOG = “/var/log/maillog” CUSTOM3_LOG = “/var/log/dovecot-info.log”” – (‘grep -rnw ‘auth ...

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SMTP Sending Limit

SMTP Sending Limit and Email Rate Limits for ISPs – Verizon, Comcast, EarthLink, etc Internet Service Providers have the most solutions at their disposal to prevent customers from sending out ...

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Bounce Errors

List of Email Bounce Codes Code Summary Description 2.XXX.YYY Success Success specifies that the DSN is reporting a positive delivery action. Detail sub-codes may provide notification of transformations required for ...

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    Installing PMTA

    PMTA Powermta Introduction PowerMTA is a Commercial ...

    By Ilirjan Trushilla / January 14, 2023

    Sender Dependent

    Introduction to Outgoing IPs By default, ...

    By Ilirjan Trushilla / January 14, 2023

    Preheader

    You can insert invisible pre-header text ...

    By Ilirjan Trushilla / January 14, 2023

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