I am using Bitnami hosted Phabricator 20150929-0 on AWS.
When I add a comment to a commit in Diffusion and mark it as a defect, the resulting email that should be sent to the author of the commit is ending up in a delivery failure. Other emails like "Email Verification" are successfully sent and received. I am using Gmail as the email provider. Here is the output of "mail list-outbound":
```
$
./apps/phabricator/htdocs/bin/mail list-outbound
1 Sent [Phabricator] Email Verification
<snip>
6 Delivery Failed rG3b43581a8f15: Diffrential test
```
Here is the output of "mail show-outbound --id 6":
```
$ ./apps/phabricator/htdocs/bin/mail show-outbound --id 6
PROPERTIES
ID: 6
Status: fail
Related PHID: PHID-CMIT-at63jdgami6vgmjurkwi
Message: Invalid address: null+COMMIT6+1+3b61ded100f38e3b@127.0.0.1
PARAMETERS
sensitive:
subject: rG3b43581a8f15: Diffrential test
from: PHID-USER-cnpydbflbqwtmqhexbsy
subject-prefix: [Diffusion]
vary-subject-prefix: [Raised Concern]
thread-id: diffusion-audit-PHID-CMIT-at63jdgami6vgmjurkwi
is-first-message:
exclude: []
herald-force-recipients: []
mailtags: ["audit-other","audit-action-concern","audit-comment"]
is-bulk: 1
reply-to: null+COMMIT6+1+3b61ded100f38e3b@127.0.0.1
to: ["PHID-USER-cnpydbflbqwtmqhexbsy"]
HEADERS
X-Phabricator-Sent-This-Message: Yes
X-Mail-Transport-Agent: MetaMTA
X-Auto-Response-Suppress: All
X-Phabricator-Mail-Tags: <audit-other>, <audit-action-concern>, <audit-comment>
Thread-Topic: Commit rG3b43581a8f1513f8d77c2dca19934ec040750072
X-Phabricator-To: <PHID-USER-cnpydbflbqwtmqhexbsy>
X-Phabricator-Cc: <PHID-USER-cnpydbflbqwtmqhexbsy>
Precedence: bulk
TEXT BODY
admin added a subscriber: admin.
admin raised a concern with this commit.
BRANCHES
master
INLINE COMMENTS
/NewFile:5 Please use correct grammar.
USERS
admin (Auditor)
COMMIT
http://company.com:80/rG3b43581a8f15
EMAIL PREFERENCES
http://company.com:80/settings/panel/emailpreferences/
To: admin
Cc: admin
HTML BODY
<div>admin added a subscriber: admin.<br />
admin raised a concern with this commit.</div><br /><div><strong>BRANCHES</strong><div><div>master</div></div></div><br /><div><strong>INLINE COMMENTS</strong><div><div>/NewFile:5 Please use correct grammar.</div></div></div><br /><div><strong>USERS</strong><div><div>admin (Auditor)</div></div></div><br /><div><strong>COMMIT</strong><div><a href="http://company.com:80/rG3b43581a8f15" rel="noreferrer">http://company.com:80/rG3b43581a8f15</a></div></div><br /><div><strong>EMAIL PREFERENCES</strong><div><a href="http://company.com:80/settings/panel/emailpreferences/" rel="noreferrer">http://company.com:80/settings/panel/emailpreferences/</a></div></div><br /><div><strong>To: </strong>admin<br /><strong>Cc: </strong>admin<br /></div>
```
If try to send a test email it succeeds:
```
$ ./apps/phabricator/htdocs/bin/mail send-test --to user --subject test < test.txt
Reading message body from stdin...
Mail sent! You can view details by running this command:
phabricator/ $ ./bin/mail show-outbound --id 11
~$ ./apps/phabricator/htdocs/bin/mail list-outbound
1 Sent [Phabricator] Email Verification
<snip>
9 Delivery Failed rG3b43581a8f15: Diffrential test
11 Sent test
```
Any idea what the cause of this error is? How do I fix it?
Thanks!