Parts of the subject line disappear when answering

[Rick1971]

Hello,

I´m new here so maybe I´m posting this in the wrong area. Accept my apologies for that.

I noticed the following phenomenon. I received an email with 3 letters followed by a colon in the subject line. After the colon there was a space and then some more information. When I answered to this email, the 2 letters and the colon disappeared but everything else remained in the subject line. An AW: was added in front of course. We used this 3 letter code for our customer followed by the subject. When answering ony the subject is left but the customer code is gone. I tried it with 4 letters - no problem. I left away the colon - no error.

What is the reason for this?

Thanks in advance Rick

[#2]

You almost guessed it already; It is being removed as it is interpreted as a standard prefix like for replying and forwarding.

The prefix is different for each language so instead up to 3 letters followed by a colon is assumed to be a prefix and thus removed.

You've already discovered the workaround/solutions as well; Use a longer prefix or a different separator 😉