Overview Email that is sent over TCP via 127.0.0.1 or the server IP address is rejected with a “521: Relaying Denied” error message. Cause All email that passes through TCP must be authenticated with a SASL-compatible username and password, which is the login/password used to access email on the server. Solution SASL authentication is necessary to…
Overview When creating a forwarded email to deliver mail to third-party providers, such as GMail and Live, mail delivery may appear spotty with some messages never arriving. Cause Certain mail providers use internal heuristics to delay or discard email. Many of these heuristics are trade secrets known only to the service provider by design to…
Overview When migrating from a previous hosting provider or even consolidating user accounts, it may be necessary to incorporate email from elsewhere into your account. This can be achieved through a variety of ways, from easiest to most cumbersome. Migration techniques SquirrelMail Fetchmail SquirrelMail, a webmail client available within the control panel via Mail >…
Overview This article covers the raw storage structure of email on your account. All email is stored in a Maildir format, which stores email in separate files in a directory named Mail within a user’s home directory. Sample structure Directories in bold: . ├── cur │ └── 1440231926.M975332P7880V05000DAI00000000000001D1_0.sol.apnscp.com,S=1254:2, ├── dovecot-acl-list ├── dovecot.index ├── dovecot.index.cache ├── dovecot.index.log…
Overview This is a general document on what happens when an account is compromised, how it is compromised, and policies pertaining to resolving an account flagged for sending spam. How does an account get compromised? Accounts are compromised through a variety of clever engineering tactics. Just as personal software has become more powerful and smarter…
Overview Accounts that purchase a separate IP address for SSL ($2.50/mo) may also, optionally, send outbound mail solely through that IP address. This feature is called Private SMTP Routing. Before doing so, please open a ticket within the control panel. Include which domains are sending outbound e-mail to ensure proper configuration. Only these domains specified in…
Overview When migrating over hosting providers, it may be necessary to add e-mail addresses en masse. Addresses can be added within the control panel. Visit Mail > Manage Mailboxes Select Add Multiple Addressses Bulk address form will slide down Enter each address to create on its own line, format follows: <email1> <forward1>, <forward2>, <forwardN>… <email2> <forward1>, <forward2>,…
Overview Sometimes an e-mail sent from the server to a recipient will fail. There are a variety of causes and as a “best practice”, the receiving side will report the failure reason for easy understanding. However, it is prudent to note that a reason is not mandatory (just good practice) and there is no consistent…
Overview A hostname, combination of optional subdomain and mandatory domain, may be configured to act as an e-mail domain, ie. receive e-mails on that host. These hostnames are added via Mail > Mail Routing. For any domain present there, the server will act as the final destination bypassing MX lookups. This will result in problems if…
Overview E-mails sent from a Django application may use “webmaster@host.domain.tld” or another erroneous address as the From field. Cause ServerAdmin values are not set in Apache configuration for virtual hosts to prevent unintentional information leakage. Solution Set DEFAULT_FROM_EMAIL and SERVER_EMAIL in your Django settings file. An example configuration follows: EMAIL_HOST=’localhost’ EMAIL_PORT=’587′ EMAIL_HOST_USER=’myadmin@mydomain.com’ EMAIL_PASSWORD=’mysmtppassword’ DEFAULT_FROM_EMAIL=EMAIL_HOST_USER SERVER_EMAIL=EMAIL_HOST_USER Replace EMAIL_HOST_USER and EMAIL_PASSWORD values with your…