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Problema enviando adjuntos de más de 8 megas

Jald Bolívar, Colombia Ver su 1 debate		Escrito por Jald el 26 de Junio Amigos buenas tardes: Tengo un servidor Lotus Domino 7.0.1 que no permite enviar un correo con un adjunto de 8 megas aprox. Se queda en el mailbox, con el mensaje: Error transferring to a.mx.mail. YAHOO. COM; SMTP Protocol Returned a Permanent Error 554 5.7.1 This message is larger than the configured limit and has been blocked. Pero en la configuración tengo que pueda enviar o recibir hasta 15 megas. Qué puede ser?
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Escrito por Jald el 26 de Junio

Http://www-01.ibm.com/support/docview. Wss? Rs=463&context=SSKTMJ&context=SSPQ69&context=SSKTWP&context=SSRNU3&context=SSRNUY&q1=large+email&uid=swg21104946&loc=en_US&cs=utf-8&lang=en

Messages less than the maximum message size are rejected for exceeding the set size value

Technote (troubleshooting)

Problem

The allowed Maximum message size is set in the Domino Server Configuration document (Router/SMTP > Restrictions and Controls > Restrictions). A message less than the set value is not accepted. A Delivery Failure Report for "Maximum message size exceeded" is generated and returned to the sender.

Cause

By enabling SMTP debug, the SMTP conversation can be monitored. From the debug, the actual amount of data transferred is greater than the size of the message. For strictly text messages, this is generally several bytes (for header information). However, in messages with attachments, this difference can be between a few hundred kilobytes to several megabytes.
When messages are sent SMTP, they must be in MIME format. RFC 2045 standardizes two methods for encoding documents for MIME, "Quoted-Printable" and "Base64".

When attachments are encoded (usually Base64) their size increases and is greater than in their original format. How significant the increase in size is depends on the size of the attachment and its original format prior to encoding.

Therefore, the size of the message sent is often less than the size of data being transferred. The "Maximum message size" restriction is applied to the size of the message as it is being accepted (in MIME format) prior to decoding, making it appear as if the "Maximum message size" field is not operating properly.

Resolving the problem

The field is working as designed and is denying message that exceed the set limit.

Excerpts from RFC 2045 :

6.7. Quoted-Printable Content-Transfer-Encoding

The Quoted-Printable encoding is intended to represent data that
largely consists of octets that correspond to printable characters in
the US-ASCII character set. It encodes the data in such a way that
the resulting octets are unlikely to be modified by mail transport.
If the data being encoded are mostly US-ASCII text, the encoded form
of the data remains largely recognizable by humans. A body which is
entirely US-ASCII may also be encoded in Quoted-Printable to ensure
the integrity of the data should the message pass through a
character-translating, and/or line-wrapping gateway.

6.8. Base64 Content-Transfer-Encoding

The Base64 Content-Transfer-Encoding is designed to represent
arbitrary sequences of octets in a form that need not be humanly
readable. The encoding and decoding algorithms are simple, but the
encoded data are consistently only about 33 percent larger than the
unencoded data. This encoding is virtually identical to the one used
in Privacy Enhanced Mail (PEM) applications, as defined in RFC 1421 .

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