Ja, das Zertifikat sollte in Ordnung sein. Die Warnings tauchen ja auch nur bei Verbindungsaufbauten von Web.de und GMX auf, bei allen anderen Mailservern läuft alles anstandslos durch.
Einen TLSA-Record habe ich nicht gesetzt.
Ich wusste jetzt nicht, wie ich aus dem Output den Traffic zwischen STARTTLS und Verbindungsabbrucht herauslesen kann und habe daher alles auf Port 25 bis zum Eintreffen der Mail gesnifft.
09:28:50.714641 IP mout.web.de.51830 > ormanns.net.smtp: Flags [S], seq 1492311459, win 29200, options [mss 1460,sackOK,TS val 233874067 ecr 0,nop,wscale 9], length 0
09:28:50.714749 IP ormanns.net.smtp > mout.web.de.51830: Flags [S.], seq 3114145185, ack 1492311460, win 28960, options [mss 1460,sackOK,TS val 3282632510 ecr 233874067,nop,wscale 7], length 0
09:28:50.720978 IP mout.web.de.51830 > ormanns.net.smtp: Flags [.], ack 1, win 58, options [nop,nop,TS val 233874068 ecr 3282632510], length 0
09:28:50.723340 IP ormanns.net.smtp > mout.web.de.51830: Flags [P.], seq 1:37, ack 1, win 227, options [nop,nop,TS val 3282632519 ecr 233874068], length 36: SMTP: 220 mail.ormanns.net ESMTP Postfix
09:28:50.729540 IP mout.web.de.51830 > ormanns.net.smtp: Flags [.], ack 37, win 58, options [nop,nop,TS val 233874070 ecr 3282632519], length 0
09:28:50.729697 IP mout.web.de.51830 > ormanns.net.smtp: Flags [P.], seq 1:19, ack 37, win 58, options [nop,nop,TS val 233874070 ecr 3282632519], length 18: SMTP: EHLO mout.web.de
09:28:50.729739 IP ormanns.net.smtp > mout.web.de.51830: Flags [.], ack 19, win 227, options [nop,nop,TS val 3282632525 ecr 233874070], length 0
09:28:50.729817 IP ormanns.net.smtp > mout.web.de.51830: Flags [P.], seq 37:190, ack 19, win 227, options [nop,nop,TS val 3282632525 ecr 233874070], length 153: SMTP: 250-mail.ormanns.net
09:28:50.736377 IP mout.web.de.51830 > ormanns.net.smtp: Flags [P.], seq 19:29, ack 190, win 60, options [nop,nop,TS val 233874072 ecr 3282632525], length 10: SMTP: STARTTLS
09:28:50.736505 IP ormanns.net.smtp > mout.web.de.51830: Flags [P.], seq 190:220, ack 29, win 227, options [nop,nop,TS val 3282632532 ecr 233874072], length 30: SMTP: 220 2.0.0 Ready to start TLS
09:28:50.742991 IP mout.web.de.51830 > ormanns.net.smtp: Flags [P.], seq 29:294, ack 220, win 60, options [nop,nop,TS val 233874074 ecr 3282632532], length 265: SMTP
09:28:50.745069 IP ormanns.net.smtp > mout.web.de.51830: Flags [P.], seq 220:3131, ack 294, win 235, options [nop,nop,TS val 3282632540 ecr 233874074], length 2911: SMTP
09:28:50.751374 IP mout.web.de.51830 > ormanns.net.smtp: Flags [.], ack 3131, win 71, options [nop,nop,TS val 233874076 ecr 3282632540], length 0
09:28:50.753104 IP mout.web.de.51830 > ormanns.net.smtp: Flags [P.], seq 294:420, ack 3131, win 71, options [nop,nop,TS val 233874076 ecr 3282632540], length 126: SMTP
09:28:50.753479 IP ormanns.net.smtp > mout.web.de.51830: Flags [P.], seq 3131:3182, ack 420, win 235, options [nop,nop,TS val 3282632549 ecr 233874076], length 51: SMTP
09:28:50.760725 IP mout.web.de.51830 > ormanns.net.smtp: Flags [P.], seq 420:451, ack 3182, win 71, options [nop,nop,TS val 233874078 ecr 3282632549], length 31: SMTP
09:28:50.760877 IP mout.web.de.51830 > ormanns.net.smtp: Flags [F.], seq 451, ack 3182, win 71, options [nop,nop,TS val 233874078 ecr 3282632549], length 0
09:28:50.764555 IP mout.web.de.63590 > ormanns.net.smtp: Flags [S], seq 799816265, win 29200, options [mss 1460,sackOK,TS val 233874079 ecr 0,nop,wscale 9], length 0
09:28:50.764630 IP ormanns.net.smtp > mout.web.de.63590: Flags [S.], seq 3700148863, ack 799816266, win 28960, options [mss 1460,sackOK,TS val 3282632560 ecr 233874079,nop,wscale 7], length 0
09:28:50.771000 IP mout.web.de.63590 > ormanns.net.smtp: Flags [.], ack 1, win 58, options [nop,nop,TS val 233874081 ecr 3282632560], length 0
09:28:50.774171 IP mout.web.de.51830 > ormanns.net.smtp: Flags [F.], seq 451, ack 3182, win 71, options [nop,nop,TS val 233874082 ecr 3282632549], length 0
09:28:50.774185 IP ormanns.net.smtp > mout.web.de.51830: Flags [.], ack 452, win 235, options [nop,nop,TS val 3282632570 ecr 233874078,nop,nop,sack 1 {451:452}], length 0
09:28:50.774223 IP ormanns.net.smtp > mout.web.de.51830: Flags [F.], seq 3182, ack 452, win 235, options [nop,nop,TS val 3282632570 ecr 233874078], length 0
09:28:50.774935 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 1:37, ack 1, win 227, options [nop,nop,TS val 3282632570 ecr 233874081], length 36: SMTP: 220 mail.ormanns.net ESMTP Postfix
09:28:50.780410 IP mout.web.de.51830 > ormanns.net.smtp: Flags [.], ack 3183, win 71, options [nop,nop,TS val 233874083 ecr 3282632570], length 0
09:28:50.781356 IP mout.web.de.63590 > ormanns.net.smtp: Flags [.], ack 37, win 58, options [nop,nop,TS val 233874083 ecr 3282632570], length 0
09:28:50.781562 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 1:19, ack 37, win 58, options [nop,nop,TS val 233874083 ecr 3282632570], length 18: SMTP: EHLO mout.web.de
09:28:50.781590 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 19, win 227, options [nop,nop,TS val 3282632577 ecr 233874083], length 0
09:28:50.781675 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 37:190, ack 19, win 227, options [nop,nop,TS val 3282632577 ecr 233874083], length 153: SMTP: 250-mail.ormanns.net
09:28:50.788456 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 19:62, ack 190, win 60, options [nop,nop,TS val 233874085 ecr 3282632577], length 43: SMTP: MAIL FROM:<testmail@web.de> SIZE=1400
09:28:50.806394 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 190:204, ack 62, win 227, options [nop,nop,TS val 3282632602 ecr 233874085], length 14: SMTP: 250 2.1.0 Ok
09:28:50.812722 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 62:96, ack 204, win 60, options [nop,nop,TS val 233874091 ecr 3282632602], length 34: SMTP: RCPT TO:<testmail@ormanns.net>
09:28:50.853183 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 96, win 227, options [nop,nop,TS val 3282632649 ecr 233874091], length 0
09:28:50.856423 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 204:255, ack 96, win 227, options [nop,nop,TS val 3282632652 ecr 233874091], length 51: SMTP: 250 2.1.5 Ok
09:28:50.862922 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 96:170, ack 255, win 60, options [nop,nop,TS val 233874104 ecr 3282632652], length 74: SMTP: Received: from [31.19.106.51] by 3capp-webde-bs03.server.lan (via HTTP);
09:28:50.862968 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 170, win 227, options [nop,nop,TS val 3282632658 ecr 233874104], length 0
09:28:50.869421 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 170:1499, ack 255, win 60, options [nop,nop,TS val 233874105 ecr 3282632658], length 1329: SMTP: Sun, 19 Mar 2017 09:28:50 +0100
09:28:50.869457 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 1499, win 249, options [nop,nop,TS val 3282632665 ecr 233874105], length 0
09:28:50.927057 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 255:292, ack 1499, win 249, options [nop,nop,TS val 3282632722 ecr 233874105], length 37: SMTP: 250 2.0.0 Ok: queued as D07AA100522
09:28:50.935972 IP mout.web.de.63590 > ormanns.net.smtp: Flags [P.], seq 1499:1505, ack 292, win 60, options [nop,nop,TS val 233874122 ecr 3282632722], length 6: SMTP: QUIT
09:28:50.936015 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 1505, win 249, options [nop,nop,TS val 3282632731 ecr 233874122], length 0
09:28:50.937024 IP ormanns.net.smtp > mout.web.de.63590: Flags [P.], seq 292:307, ack 1505, win 249, options [nop,nop,TS val 3282632732 ecr 233874122], length 15: SMTP: 221 2.0.0 Bye
09:28:50.937051 IP ormanns.net.smtp > mout.web.de.63590: Flags [F.], seq 307, ack 1505, win 249, options [nop,nop,TS val 3282632732 ecr 233874122], length 0
09:28:50.943504 IP mout.web.de.63590 > ormanns.net.smtp: Flags [F.], seq 1505, ack 308, win 60, options [nop,nop,TS val 233874124 ecr 3282632732], length 0
09:28:50.943552 IP ormanns.net.smtp > mout.web.de.63590: Flags [.], ack 1506, win 249, options [nop,nop,TS val 3282632739 ecr 233874124], length 0
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