There are extended time periods (multiple weeks at a time) where all Bitbucket e-mail notifications are marked as spam in my e-mail inbox. Since the problem is not permanent, I am missing important notifications when the problem starts and I don't realise.
My inbox uses rspamd. Here is an example spam result header:
X-Spamd-Result: default: False [11.39 / 15.00];
R_SPF_ALLOW(0.00)[+ip4:209.85.128.0/17];
TO_DN_NONE(0.00)[];
NEURAL_SPAM(2.96)[0.986,0];
RCVD_COUNT_THREE(0.00)[3];
MX_GOOD(-0.01)[cached: alt1.aspmx.l.google.com];
CTYPE_MIXED_BOGUS(1.00)[];
FORGED_SENDER(0.30)[pullrequests-reply@bitbucket.org,candid@k15t.com];
R_DKIM_NA(0.00)[];
MIME_TRACE(0.00)[0:+,1:+,2:+,3:+,4:~];
ARC_ALLOW(0.00)[i=1];
ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US];
TAGGED_FROM(0.00)[caf_=cdauth,k15t=cdauth.eu];
FAKE_REPLY(1.00)[];
FROM_NEQ_ENVFROM(0.00)[pullrequests-reply@bitbucket.org,candid@k15t.com];
FROM_HAS_DN(0.00)[];
MID_RHS_MATCH_FROM(0.00)[];
HTML_SHORT_LINK_IMG_1(2.00)[];
TAGGED_RCPT(0.00)[k15t];
MIME_GOOD(-0.10)[multipart/mixed,multipart/related,multipart/alternative,text/plain];
RCPT_COUNT_ONE(0.00)[1];
BAD_REP_POLICIES(0.10)[];
MANY_INVISIBLE_PARTS(0.05)[1];
IP_SCORE(-0.56)[ipnet: 209.85.128.0/17(1.14), asn: 15169(-3.85), country: US(-0.09)];
BAYES_HAM(-1.95)[94.75%];
RCVD_IN_DNSWL_NONE(0.00)[169.208.85.209.list.dnswl.org : 127.0.5.0];
URIBL_SBL(6.50)[bitbucket.org];
RWL_MAILSPIKE_POSSIBLE(0.00)[169.208.85.209.rep.mailspike.net : 127.0.0.17];
RCVD_TLS_ALL(0.00)[];
GREYLIST(0.00)[pass,body];
DMARC_POLICY_SOFTFAIL(0.10)[bitbucket.org : SPF not aligned (relaxed), No valid DKIM,none]
The biggest problem seems to be the URIBL_SBL rule.
The problem seems to be that the IP address 104.192.141.1, which is the A record for bitbucket.org, is listed in the blocklist.
