email<\/em> from each one and check the From address<\/strong>. Plenty of platforms send alarms from one address and account notices from another, and that only turns up in a real message.<\/p>\n\n\n\nIt’s worth taking the five minutes to do this first step<\/strong> to make sure you’re authorizing all the addresses and domains that message you.<\/p>\n\n\n\nStep 2: Set up your senders in the text.email settings<\/h3>\n\n\n\n Head to the text.email settings for your account. Scroll down to the Authorized Senders<\/strong> section.<\/p>\n\n\n\n\n\t\t\t\n\t\t\t\tAnd there, you can enter individual email addresses, entire domains, or both.<\/p>\n\n\n\n
For example, you could authorize:<\/p>\n\n\n\n
\nalerts@example.com<\/code><\/li>\n\n\n\nmonitoring@example.com<\/code><\/li>\n<\/ul>\n\n\n\nOr you could just authorize the whole example.com domain, so any email from any address at that domain will be able to send to you (e.g., alerts@example.com<\/code>, notices@example.com<\/code>, server@monitoring.example.com<\/code>, and beyond). <\/p>\n\n\n\n\n\t\t\t\n\t\t\t\tA few other notes:<\/p>\n\n\n\n
\nYou can authorize individual emails and<\/em> domains<\/strong>, you’re not limited to one or the other.<\/li>\n\n\n\nMatching is not case-sensitive<\/strong>.<\/li>\n\n\n\nYou can enter the emails and domains in several different formats<\/strong> (separated by commas, spaces, semicolons, or new lines). text.email will detect the valid addresses and domains.<\/li>\n<\/ul>\n\n\n\nOnce you add at least one authorized sender, restriction is live on your account<\/strong>. Every email sent to your private text.email subdomain must come from one of the addresses or domains on your list.<\/p>\n\n\n\nThe restriction applies to the visible From address<\/strong> in the email, not the underlying SMTP return address sometimes used for bounces and delivery handling.<\/p>\n\n\n\nStep 3 (recommended): Test this out<\/h3>\n\n\n\n Since you’re now restricting who can send to your text.email address, it’s worth testing this out.<\/p>\n\n\n\n
If possible, initiate a test alert from all of your systems to make sure everything is still going through.<\/p>\n\n\n\n
How to remove all restrictions<\/h3>\n\n\n\n Want to get your account back to its original, unrestricted behavior?<\/p>\n\n\n\n
Just delete every entry<\/strong> from the Authorized Senders list.<\/p>\n\n\n\nWhen the list is empty, the Settings page will show: All addresses\/domains are allowed to send to your subdomain.<\/p>\n\n\n\n
What Happens When an Unauthorized Sender Tries to Send You a Message?<\/h2>\n\n\n\n If an email’s From address does not match anything on your Authorized Senders list, text.email will not send the SMS.<\/p>\n\n\n\n
Two things happen:<\/p>\n\n\n\n
\nThe original email bounces.<\/strong> The sending system receives a delivery failure indicating that the email was rejected because its From address is not authorized for that text.email account.<\/p><\/li>\n\n\n\nYou (or whoever owns the account) will get a notification.<\/strong> text.email periodically sends an email about rejected attempts to the account owner. It includes the rejected From address and the private text.email address it attempted to use.<\/span><\/p><\/li>\n<\/ol>\n\n\n\nThis bounce + notification pair lets automated systems detect the failure through the bounce while also making sure that the account owner knows legitimate alerts may not be getting through.<\/p>\n\n\n\n
Ready to Get Going with Authorized Senders?<\/h2>\n\n\n\n So, again, you don’t necessarily need to use authorized senders with text.email. If you’re pretty sure the private subdomain system provides enough protection for your use, then adding authorized senders is overkill.<\/p>\n\n\n\n
But if your text.email address is sitting in multiple configs<\/strong> \u2014 especially on systems that other people can access \u2014 then it’s probably worth the time to lock down who can send you messages<\/strong>.<\/p>\n\n\n\nThe whole process is quick and reversible, so not a big loss if you ultimately change your mind.<\/p>\n\n\n\n
If you’re a text.email subscriber, authorized senders are already live<\/em> in your account<\/strong>. Just go to your text.email settings page to get them rolling.<\/p>\n\n\n\nAnd if you’re not a text.email user yet, authorized senders is just one of our great security features<\/strong> (you’ll also probably like our SMS encryption<\/a>).<\/p>\n\n\n\nYou can try out text.email for free<\/strong>, with no signup required. Just send an email to your-number@text.email<\/code> and watch it come through to your phone as a SMS message moments later.<\/p>\n","protected":false},"excerpt":{"rendered":"How to set up authorized senders to restrict who can send email to SMS messages to your text.email address.<\/p>\n","protected":false},"author":1,"featured_media":716,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,8],"tags":[],"class_list":["post-697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-email-to-sms","category-text-email-tips"],"_links":{"self":[{"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/posts\/697","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/comments?post=697"}],"version-history":[{"count":4,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/posts\/697\/revisions"}],"predecessor-version":[{"id":711,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/posts\/697\/revisions\/711"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/media\/716"}],"wp:attachment":[{"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/media?parent=697"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/categories?post=697"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/text.email\/blog\/wp-json\/wp\/v2\/tags?post=697"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"\"](\"https:\/\/text.email\/blog\/wp-content\/uploads\/2026\/07\/authorized-optionsscreen-tinified-1024x598.png\")