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Sending Email by idSMTP from computers with underscore in name
#1
I realized, that an underscore in the computer name effectivly prevents sending of emails with Indy's TIdSMTP, TIdMessage & TIdSSLIOHandlerSocketOpenSSL.

I use Delphi XE3 with latest Indy 10.6.2. and latest SSLs (utUseExplicitTLS & port 587).

TIdLogfile shows this message when the computer name contains an "_":
"501 Syntactically invalid EHLO argument(s)"

I tested this with Windows pro 7 and 10.
Can anybody reproduce this?

When I change the computer name to a string not containing an underscore, mails are sent!

This observation is coherent with another user's problem, described here:
https://github.com/jens-maus/yam/issues/325

Is there a workaround that enables sending IdSMTP mails also from computer names with underscore?
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Sending Email by idSMTP from computers with underscore in name - by Steffen - 04-12-2019, 09:19 AM

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