incompatibilidad de servidores ???

[Leioa]

A Q PUEDE DEBERSE ESTE MENS D ERROR ???
Me ocurre al mandar emails de mas de 5 kb entre cuentas de distintos servidores.
Q son las direcciones del final ???


Action: failed
Status: 5.0.0
Diagnostic-Code: smtp;550 DATA line too long (Max 1024)
.<CRLF>
tensions (SIZE=6573) Ok
N
250-SIZE 10485760
250-AUTH PLAIN LOGIN
250 AUTH=LOGIN
V04.50c++
250 XMVP 2
no reverse-DNS (PTR record) assigned.
addresses which
220 have no reverse-DNS (PTR record) as
ions from IP addresses which
220 have no reverse-DNS (PTR record) assigned.

ipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
250 2.1.5 <[email protected]>... Recipient ok
550 5.1.1 <[email protected]>... No such user
250 2.1.5 <[email protected]>... Recipient ok
550 5.1.1 <[email protected]>... No such user
250 2.1.5

[JulianD]

Podría ayudar si dices características de tu sistemas más a fondo, como el software que usas, el servidor de correo que software tiene (si lo sabes), etc....

Las direcciones al final te suenan parecido? Las conoces? O no tienes ni idea de donde puedan venir.