gmail partly blocks emails sent from trac as spam

[Klumbumbus]

I didn't receive emails for new comments on "subscribed" tickets:

• ticket:14086#comment:7
• ticket:14098#comment:2

[stoecker]

Well, it seems Google starts to block mails sent from our trac and it seems there is nothing I can do against this.

[stoecker]

This is the mail system at host josm.openstreetmap.de.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<...yourmail...@gmail.com>: host
    gmail-smtp-in.l.google.com[2a00:1450:400c:c07::1b] said: 550-5.7.1
    [2a01:4f8:c17:2906::2       7] Our system has detected that this 550-5.7.1
    message is likely unsolicited mail. To reduce the amount of spam sent
    550-5.7.1 to Gmail, this message has been blocked. Please visit 550-5.7.1
    https://support.google.com/mail/?p=UnsolicitedMessageError 550 5.7.1  for
    more information. q126si13529028wme.18 - gsmtp (in reply to end of DATA
    command)

[stoecker]

Well, maybe there are some things I can do. But that's some work...

[Klumbumbus]

Hm, for your both comments above and for a comment on another ticket I received mails again.

[stoecker]

Not all mails are/were rejected and I did some of the easier things to improve situation.

[stoecker]

No more rejects in the last 2 weeks.