[fw-general] Malformed Email from Zend_Mail

[Jason Lustig]

When I send out plain text emails from my application using  
Zend_Mail, the text becomes malformed, like this, see the marks at  
the beginning and end of each line:

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed lorem  
erat,=
=0Aimperdiet ut, laoreet a, tincidunt lobortis, nibh. Vestibulum  
pharetra.=
=0ASuspendisse hendrerit, diam id vehicula scelerisque, urna tellus  
dapibu=
s=0Aest, nec ullamcorper arcu purus et est. Vestibulum a massa. Fusce  
vel=
=0Aneque. Etiam aliquet bibendum pede. Donec placerat nunc. Sed  
tempus era=
t=0Avel nisi. In dapibus ligula a elit. Suspendisse potenti. Aenean  
tristi=
que=0Aeros et sapien. Aenean convallis ligula ut orci. Nullam  
molestie nun=
c=0Ahendrerit tortor.

I tried it with a different mail server and got similar (though not  
exactly the same) results - see the equals marks at the end of each  
line:

Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Sed lorem  
erat,=
imperdiet ut, laoreet a, tincidunt lobortis, nibh. Vestibulum  
pharetra. S=
uspendisse hendrerit, diam id vehicula scelerisque, urna tellus  
dapibus es=
t, nec ullamcorper arcu purus et est. Vestibulum a massa. Fusce vel  
neque.=
Etiam aliquet bibendum pede. Donec placerat nunc. Sed tempus erat vel  
nis=
i. In dapibus ligula a elit. Suspendisse potenti. Aenean tristique  
eros et=
sapien. Aenean convallis ligula ut orci. Nullam molestie nunc  
hendrerit t=
ortor.

Does anyone know why it would do this? It is very problematic and I  
can't seem to see it happening with any other emails.

Thanks
Jason