I get a message list this every couple months or so. I know that's not frequent, but they always say the same thing: <timur.tabi@xxxxxxxxx>: User and password not set, continuing without authentication. <timur.tabi@xxxxxxxxx> 74.125.197.26 failed after I sent the message. Is it possible that gcc-help is trying to forward a spam or virus email, and then blaming me when my server (gmail.com) rejects it? ---------- Forwarded message --------- From: <gcc-help-help@xxxxxxxxxxx> Date: Mon, Nov 19, 2018 at 4:26 PM Subject: ezmlm warning To: <timur.tabi@xxxxxxxxx> Hi! This is the ezmlm program. I'm managing the gcc-help@xxxxxxxxxxx mailing list. Messages to you from the gcc-help mailing list seem to have been bouncing. I've attached a copy of the first bounce message I received. If this message bounces too, I will send you a probe. If the probe bounces, I will remove your address from the gcc-help mailing list, without further notice. I've kept a list of which messages from the gcc-help mailing list have bounced from your address. Copies of these messages may be in the archive. To retrieve a set of messages 123-145 (a maximum of 100 per request), send an empty message to: <gcc-help-get.123_145@xxxxxxxxxxx> To receive a subject and author list for the last 100 or so messages, send an empty message to: <gcc-help-index@xxxxxxxxxxx> Here are the message numbers: 62761 --- Enclosed is a copy of the bounce message I received. Return-Path: <> Received: (qmail 118010 invoked for bounce); 8 Nov 2018 00:26:56 -0000 Date: 8 Nov 2018 00:26:56 -0000 From: MAILER-DAEMON@xxxxxxxxxxxxxx To: gcc-help-return-62761-@xxxxxxxxxxx Subject: failure notice Hi. This is the qmail-send program at sourceware.org. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. <timur.tabi@xxxxxxxxx>: User and password not set, continuing without authentication. <timur.tabi@xxxxxxxxx> 74.125.197.26 failed after I sent the message. Remote host said: 552-5.7.0 This message was blocked because its content presents a potential 552-5.7.0 security issue. Please visit 552-5.7.0 https://support.google.com/mail/?p=BlockedMessage to review our 552 5.7.0 message content and attachment content guidelines. k8-v6si39184679pgj.192 - gsmtp