On 2018-07-31 08:22 AM, vinod mishra wrote:
There is chances of attack/spam through your Koha server, however gmail always block such automated emails after some time as per my observation. [snip] On Tue, Jul 31, 2018 at 5:45 PM, Hira Akram <hira.akram@almusnet.com> wrote:
I Checked and it is showing too many login attempts in log that’s why google server has blocked emails from this account. In Gmail account, it is showing too many random emails on invalid accounts. But I haven’t sent these through Koha or anything. Is it possible that koha sent these emails automatically??
This is not a Koha problem. Do you use DKIM and SPF? If so you can *perhaps* contact gmail for a solution. See <https://support.google.com/mail/answer/6227174>, specifically "authentication domain". In a nutshell, email deliverability to gmail is getting very complicated -- they handle billions of pieces of email/day, and (since at least 2015) have radical protection/rejection practices after even the most minor "sniff" of UBE -- and this could well not be *you* but some other user in a bigger block of IP space that has a bad reputation. Your logs show "(delivery temporarily suspended: connect to smtp.gmail.com[74.125.24.109]:587: Connection timed out)" which looks like tar-pitting. Unless you have an experienced email technician on staff, you could have problems. Once your (or whoever owns your block of IP space) "reputation" is hurt, it's not easy to get delisted. Good luck -- Paul [snip]
example is shown here. --------- # tail -f /var/log/mail.log Apr 28 11:20:03 gechlibrary postfix/smtpd[4449]: disconnect from localhost[127.0.0.1] Apr 28 11:20:32 gechlibrary postfix/smtp[4451]: connect to smtp.gmail.com [74.125.24.108]:587: Connection timed out Apr 28 11:20:32 gechlibrary postfix/smtp[4452]: connect to smtp.gmail.com [74.125.24.109]:587: Connection timed out Apr 28 11:21:02 gechlibrary postfix/smtp[4451]: 9BE0E7805B6: to=< xyz@gmail.com>, relay=none, delay=60, delays=0.12/0/60/0, dsn=4.4.1, status=deferred (connect to smtp.gmail.com[74.125.24.109]:587: Connection timed out) Apr 28 11:21:03 gechlibrary postfix/smtp[4452]: connect to smtp.gmail.com [74.125.24.108]:587: Connection timed out Apr 28 11:21:03 gechlibrary postfix/smtp[4452]: C7A8F7805E6: to=< xyz@gmail.com>, relay=none, delay=60, delays=0.07/0.01/60/0, dsn=4.4.1, status=deferred (connect to smtp.gmail.com[74.125.24.108]:587: Connection timed out) Apr 28 11:21:03 gechlibrary postfix/smtp[4453]: connect to smtp.gmail.com [74.125.24.108]:587: Connection timed out Apr 28 11:21:03 gechlibrary postfix/smtp[4453]: E4358780614: to=< pqrs@gmail.com>, relay=none, delay=60, delays=0.07/0.01/60/0, dsn=4.4.1, status=deferred (connect to smtp.gmail.com[74.125.24.108]:587: Connection timed out)
firewall was blocked, and because of this reason, status = deferred was appeared in mail log.
#mialq
18308780A2A 918 Sat Apr 28 10:40:03 root@localhost (delivery temporarily suspended: connect to smtp.gmail.com[74.125.24.109]:587: Connection timed out)