Long Attachment Filename Gets Mangled By MTA (Doc ID 2242796.1)

Last updated on APRIL 20, 2021

Applies to:

Symptoms

On :  7.0.5 version, MTA

long attachment filename gets mangled by MTA.

In the submitted message, there is a MIME part with:

filename="prf3_sa_xxxxx_208116@example.com_<prf3_sa_xxxxx_208116@example.com>_________9_1_inl.jpeg"

Which is fixed to:

Content-type: image/jpeg; name*0="_xxxxx_208116@example.com_<prf3_sa_xxxxx_20";
 name*1="8116@example.com>___";
 name*2="______9_1_"; name*3=inl.jpeg
Content-transfer-encoding: base64
Content-disposition: inline;
 filename*0="_xxxxx_208116@example.com_<prf3_sa_xxxxx_20";
 filename*1="8116@example.com>___";
 filename*2="______9_1_"; filename*3=inl.jpeg

…with prefix prf3_sa_ being truncated. The other file name in the email gets truncated too.

Cause

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