Sending email reports complete success, but I can see from logs it partially failed

[ghassan (Ghassan Maslamani)]

Hey,

First The Thread you are referring to resolve differen’t issue of which the error thrown was SMTPSenderRefused

@oedx

[36;1mlms-worker_1     |[0m     raise SMTPSenderRefused(code, resp, from_addr)
[36;1mlms-worker_1     |[0m smtplib.SMTPSenderRefused: (421, b'4.7.0 Try again later, closing connection. (MAIL) r186sm3113766qkf.128 - gsmtp',

While qouting your logs above it’s SMTPServerDisconnected

@ABC

lms-worker_1                 |     raise SMTPServerDisconnected("Connection unexpectedly closed")
lms-worker_1                 | smtplib.SMTPServerDisconnected: Connection unexpectedly closed

Secondaly to resolve your issue, is to try to the error as I did in the thread you linked above, i.e.

This https://github.com/openedx/edx-platform/blob/d7ca7c14cd2ea1177e464d3c386aa6918e9b0093/lms/djangoapps/bulk_email/tasks.py#L569
except (SMTPDataError, SMTPSenderRefused) as exc:
becomes

except (SMTPDataError, SMTPSenderRefused, SMTPServerDisconnected) as exc:

PS: I don’t the consequence of this nor did I try it, it’s just what I would do if I were in your place.