[exim-dev] [Bug 2885] New: Emails to Gmail receive "Remote h…

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Author: admin
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To: exim-dev
New-Topics: [exim-dev] [Bug 2885] 4.95-2 Emails to Gmail receive "Remote host closed connection in response to end of data" (4.94.2 ok), [exim-dev] [Bug 2885] 4.95-2 Emails to Gmail receive "Remote host closed connection in response to end of data" (4.94.2 ok), [exim-dev] [Bug 2885] 4.95-2 Emails to Gmail receive "Remote host closed connection in response to end of data" (4.94.2 ok)
Subject: [exim-dev] [Bug 2885] New: Emails to Gmail receive "Remote host closed connection in response to end of data" (4.94.2 ok)
https://bugs.exim.org/show_bug.cgi?id=2885

            Bug ID: 2885
           Summary: Emails to Gmail receive "Remote host closed connection
                    in response to end of data" (4.94.2 ok)
           Product: Exim
           Version: 4.95
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: bug
          Priority: medium
         Component: Delivery in general
          Assignee: unallocated@???
          Reporter: gibbathehutt@???
                CC: exim-dev@???


We've tried upgrading from Exim 4.94.2-2 to 4.95-2.
4.94.2 is good, 4.95-2 produces the errors.

Emails to places like hotmail/Outlook/Yahoo etc are all fine.

Emails to gmail produce the message "Remote host closed connection in response
to end of data"

It seems to try several times, rotating through gmails alt servers. I.e full
messages for a single email send may be...

<id> <= <sourceemail> U=<username> P=local S=25937
<id> H=gmail-smtp-in.l.google.com [142.251.5.26]: Remote host closed connection
in response to end of data
<id> H=alt1.gmail-smtp-in.l.google.com [142.250.153.27]: Remote host closed
connection in response to end of data
<id> H=alt2.gmail-smtp-in.l.google.com [142.251.9.26]: Remote host closed
connection in response to end of data
<id> H=alt3.gmail-smtp-in.l.google.com [142.250.150.26]: Remote host closed
connection in response to end of data
<id> H=alt4.gmail-smtp-in.l.google.com [74.125.200.27]: Remote host closed
connection in response to end of data
<id> <receipientemail>R=dnslookup T=remote_smtp defer (-18)
H=alt4.gmail-smtp-in.l.google.com [74.125.200.27]: Remote host closed
connection in response to end of data
Maybe 20 mins later it can sometimes go through with...

R=dnslookup T=remote_smtp H=gmail-smtp-in.l.google.com [142.251.5.27] K C="250
2.0.0 OK <long id> - gsmtp
<id> Completed


Switching back to 4.94.2-2, all emails go through straight away..
<id> <recipientemail> R=dnslookup T=remote_smtp H=gmail-smtp-in.l.google.com
[74.125.140.26] TFO K C="250 2.0.0 OK <longid> - gsmtp"

Using a normal config with the following amendments.
EXIM_USER=exim
# LOOKUP_DNSDB=yes
DISABLE_TLS=yes
#SUPPORT_DANE=yes
CC=gcc -std=gnu99 -lrt

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