diff --git a/froide/helper/email_log_parsing.py b/froide/helper/email_log_parsing.py
index 8b0ae3151..83e2a9961 100644
--- a/froide/helper/email_log_parsing.py
+++ b/froide/helper/email_log_parsing.py
@@ -22,7 +22,7 @@ class PostfixLogfileParser(collections.abc.Iterator):
 
     DEFAULT_RELEVANT_FIELDS = {"message-id", "from", "to", "status", "removed"}
     QUEUE_ID_REGEX = r"(?P<queue_id>[0-9A-F]{6,}|[0-9a-zA-Z]{12,})"
-    TIMESTAMP_RE = r"(?P<timestamp>\w{3}\s+\d+\s+\d+:\d+:\d+)"
+    TIMESTAMP_RE = r"(?P<timestamp>(\w{3}\s+\d+\s+\d+:\d+:\d+)|(\d{4}-[01]\d-[0-3]\dT[0-2]\d:[0-5]\d:[0-5]\d\.\d+([+-][0-2]\d:[0-5]\d|Z)))"
     USER_RE = r"(?P<user>[^ ]+)"
     PROCESS_RE = r"(?P<process>[^:]+)"
     FIELDS_RE = r"(?P<fields>.*)"
diff --git a/froide/helper/tests/test_email_log_parsing.py b/froide/helper/tests/test_email_log_parsing.py
index 97821a4f5..a7f687b86 100644
--- a/froide/helper/tests/test_email_log_parsing.py
+++ b/froide/helper/tests/test_email_log_parsing.py
@@ -274,3 +274,18 @@ def test_bouncing_email(req_with_msgs: FoiRequest):
     assert (
         ProblemReport.objects.filter(message=msg).count() == problem_reports_before + 1
     )
+
+
+def test_isodate():
+    invocations = []
+
+    def callback(**kwargs):
+        invocations.append(kwargs)
+
+    email_left_queue.connect(callback)
+    assert len(invocations) == 0
+    with tempfile.TemporaryDirectory() as dir:
+        check_delivery_from_log([p("maillog_007.txt")], Path(dir + "/mail_log.offset"))
+        assert len(invocations) == 1
+
+    assert invocations[0]["message_id"] == MAIL_1_ID
diff --git a/froide/helper/tests/testdata/maillog_007.txt b/froide/helper/tests/testdata/maillog_007.txt
new file mode 100644
index 000000000..345b26de5
--- /dev/null
+++ b/froide/helper/tests/testdata/maillog_007.txt
@@ -0,0 +1,10 @@
+2025-01-01T00:01:02.456789+01:00 mail postfix/smtpd[1234567]: 163CB3EE5E7F: client=localhost.localdomain[127.0.0.1], sasl_method=PLAIN, sasl_username=examplemail@example.com
+2025-01-08T10:29:21.062584+01:00 mail postfix/cleanup[2345678]: 163CB3EE5E7F: message-id=<foirequest/123123@example.com>
+2025-01-01T00:01:02.456789+01:00 mail opendkim[2345678]: 163CB3EE5E7F: DKIM-Signature field added (s=mail, d=example.com)
+2025-01-01T00:01:02.456789+01:00 mail postfix/qmgr[2345678]: 163CB3EE5E7F: from=<bounce+asdadasd=+132kl12j31n12d1190+a.foo=example.com@example.com>, size=12321, nrcpt=1 (queue active)
+2025-01-01T00:01:02.456789+01:00 mail postfix/smtp[2345678]: 163CB3EE5E7F: to=<a.foo@example.com>, relay=example.com[123.456.789.123]:25, delay=0.67, delays=0.1/0.37/0.13/0.07, dsn=2.0.0, status=sent (250 Requested mail action okay, completed: id=aaaaa-bbbbb-ccccc-ddddd
+)
+2025-01-01T00:01:02.456789+01:00 mail postfix/qmgr[2345678]: 163CB3EE5E7F: removed
+2025-01-01T00:01:02.456789+01:00 mail postfix/smtpd[2345678]: 065AB16D682C: client=localhost.localdomain[127.0.0.1], sasl_method=PLAIN, sasl_username=examplemail@example.com
+2025-01-01T00:01:02.456789+01:00 mail postfix/cleanup[2345678]: 065AB16D682C: message-id=<foimsg.1324123.12312312312312.1231@mail.example.com>
+2025-01-01T00:01:02.456789+01:00 mail opendkim[2345678]: 065AB16D682C: DKIM-Signature field added (s=mail, d=example.com)