It seems you are missing the size check in the DATA ACL and so the
messages are refused in the transport that, as you report, gives a very
unhelpful error.
The "acl/40_exim4-config_check_data" that ships with stretch should
refuse the messages with "maximum allowed line length is 998 octets, g
Package: exim4
Version: 4.88-2
Severity: normal
Hi!
If an user agent attempts to send a mail containing lines longer than SMTP's
allowed max of 998 bytes (such as reportbug -- #849765), exim's response is
extremely unhelpful.
The user gets:
.[ Mail delivery failed: returning message to sender
2 matches
Mail list logo
