MXToolbox: SMTP 8.128 seconds - Not good! on Transaction Time
how can i solve this issue and what is responsible for it?
this delay causes applications that wait for the email to be sent out via SMTP to stop. That introduces unwanted waiting times.
Here the Postfix log with almost 10s delay:
05/15/2023, 01:45:59 PM info 67372181354: removed
05/15/2023, 01:45:59 PM info 67372181354: to=mail@xxx.app, orig_to=gugu@xxx.app, relay=dovecot[fd4d:6169:6c63:6f77::f]:24, delay=9.4, delays=9.2/0.02/0.03/0.07, dsn=2.0.0, status=sent (250 2.0.0 mail@xxx.app GBA+JocpYmRkKQAAb5osIA Saved)
05/15/2023, 01:45:59 PM info disconnect from unknown[xxx.101.164.xxx] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
05/15/2023, 01:45:59 PM info 67372181354: from=mail@xxx.app, size=7096, nrcpt=1 (queue active)
05/15/2023, 01:45:55 PM info 67372181354: message-id=ff2746109a7f218702015913e5f81253@admin.xxx.app
05/15/2023, 01:45:55 PM info 67372181354: replace: header Received: from admin.xxx.app (unknown [xxx.101.164.xx])??(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)?? key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SH from unknown[xxx.101.164.xxx]; from=mail@xxx.app to=gugu@xxx.app proto=ESMTP helo=<admin.xxx.app>: Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 67372181354??for gugu@xxx.app; Mon, 15 May 2023 14:45:50 +0200 (CEST)
05/15/2023, 01:45:55 PM info 67372181354: client=unknown[xxx.101.164.xxx], sasl_method=LOGIN, sasl_username=mail@xxx.app
05/15/2023, 01:45:50 PM info Anonymous TLS connection established from unknown[xxx.101.164.xxx] to mail.reventor.eu: TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256
05/15/2023, 01:45:50 PM info connect from unknown[xxx.101.164.xxx]