Is it possible to tell which email client customers use?

albatroz

Well-Known Member
Mar 6, 2003
401
6
168
Virtual Orbis / Peru
cPanel Access Level
Root Administrator
Twitter
Hello,
I was wondering if there is a way to sniff out the email messages my messages send
to tell the versions of the software my customers are using.
It happens that I have the impression that some of them are using very old versions
of Outlook that are forcing them to use unencrypted connections.
 

LucasRolff

Well-Known Member
Community Guide Contributor
May 27, 2013
143
89
78
cPanel Access Level
Root Administrator
Most clients will add their "signature" to the mail-headers what is used.

Can be added in the MIME-Version header, X-Mailer header or User-Agent header for example.

Outlook tends to put an X-Mailer header such as X-Mailer: Microsoft Outlook 16.0, and then it's just looking up the version here: Outlook versions, build numbers and other trivia - MSOutlook.info
 
  • Like
Reactions: cPanelMichael

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,908
2,216
463
Hello @albatroz,

Let us know if you have any additional questions.

Thank you.