sendmail limits

Giorgos Keramidas keramida at
Tue Mar 10 08:33:29 PDT 2009

On Tue, 10 Mar 2009 15:43:12 +0100 (CET), Wojciech Puchar <wojtek at> wrote:
>> On Tue, 10 Mar 2009 08:51:12 +0100 (CET), Wojciech Puchar <wojtek at> wrote:
>>> i'm just asking for sure - do sendmail has any limits of how much
>>> adresses is put in CC/BCC in single mail?
>> Yes, of course.  There is *support* for a limit, but the default
>> is to accept a large number of recipients per-message:
>>  confMAX_RCPTS_PER_MESSAGE  MaxRecipientsPerMessage
>>      [default: infinite] If set, allow no more than the specified
>>      number of recipients in an SMTP envelope.  Further recipients
>>      receive a 452 error code (i.e., they are deferred for the
>>      next delivery attempt).
>> You can set this easily, by modifying `' to include:
>>  define(`confMAX_RCPTS_PER_MESSAGE', `20')
> thank you very much. that's what i was looking for.

You are welcome :)

FWIW, there are many more options & tunables.  You can read about them
in the `/usr/share/sendmail/cf/README' file.

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