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Subject [GitHub] [ant] twogee commented on issue #100: Send FQDN instead of simple hostname in SMTP HELO command
Date Wed, 04 Sep 2019 09:34:58 GMT
twogee commented on issue #100: Send FQDN instead of simple hostname in SMTP HELO command
URL: https://github.com/apache/ant/pull/100#issuecomment-527823892
 
 
   Looking further, RFC-821 states "The argument field contains the host name of the sender-SMTP."
and the formal syntax suggests that "domain" means FQDN. RFC-2821 clarifies
   ```
     The argument field contains the fully-qualified domain name
      of the SMTP client if one is available.  In situations in which the
      SMTP client system does not have a meaningful domain name (e.g., when
      its address is dynamically allocated and no reverse mapping record is
      available), the client SHOULD send an address literal (see section
      4.1.3), optionally followed by information that will help to identify
      the client system. 
   ```
   RFC-5321 deprecates the use of address literals.

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