11---
22title : " custom elements"
33category : " sending-email"
4- group : " tracking"
54---
6- <!-- <aside>
7-
8- #### Included In This Article
9-
10- [Headers](#headers)
11- [Emphasis](#emphasis)
12- [Lists](#lists)
13- [Links](#links)
14- [Images](#images)
15- [Code and Syntax Highlighting](#code)
16- [Tables](#tables)
17- [Inline HTML](#html)
18- [Horizontal Rule](#hr)
19- [Line Breaks](#lines)
20- [Embed Videos](#videos)
21-
22- </aside> -->
23-
24- <aside >
25-
26- - [ What is domain authentication ok?] ( #-What-is-domain-authentication )
27- - [ Key terminology] ( #-Key-terminology )
28- - [ DNS] ( #-DNS )
29- - [ DKIM] ( #-DKIM )
30- - [ SPF] ( #-SPF )
31- - [ CNAME] ( #-CNAME )
32- - [ Setting up domain authentication] ( #-Setting-up-domain-authentication )
33- - [ Before you begin] ( #-Before-you-begin )
34- - [ Setting up DNS] ( #-Setting-up-DNS )
35- - [ Advanced settings] ( #-Advanced-settings )
36- - [ Using automated security] ( #-Using-automated-security )
37- - [ Using a custom return path] ( #-Using-a-custom-return-path )
38- - [ Using a custom DKIM selector] ( #-Using-a-custom-DKIM-selector )
39- - [ Assigning a subuser] ( #-Assigning-a-subuser )
40- - [ Migrating from legacy Whitelabel] ( #-Migrating-from-legacy-Whitelabel )
41-
42- </aside >
43-
44- <div class =" doc-main " />
45-
46- <a name =" headers " />
5+
476
487## Headers
498
9+
5010``` no-highlight
5111# H1
5212## H2
@@ -55,34 +15,50 @@ group: "tracking"
5515##### H5
5616###### H6
5717
58- Alternatively, for H1 and H2, an underline-ish style like:
18+ Alternatively, for H1 and H2, an underline-ish style like
5919
6020Alt-H1
6121======
6222
6323Alt-H2
6424------
6525```
26+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
6627
67- # H1
28+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
29+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
6830
69- ## H2
31+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
32+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
7033
71- ### H3
34+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
35+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
7236
73- #### H4
37+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
38+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
7439
75- ##### H5
40+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
41+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
7642
77- ###### H6
43+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
44+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
45+
46+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
47+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
48+
49+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
50+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
7851
79- Alternatively, for H1 and H2, an underline-ish style:
52+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
53+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
8054
81- # Alt-H1
55+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
56+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
8257
83- ## Alt-H2
58+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
59+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
8460
85- < a name = " emphasis " />
61+ Mauris potenti porta ad litora mattis lorem euismod, quisque auctor lacinia cubilia velit lectus suscipit platea, ornare tellus felis etiam et dui.
8662
8763## Emphasis
8864
@@ -104,7 +80,6 @@ Combined emphasis with **asterisks and _underscores_**.
10480
10581Strikethrough uses two tildes. ~~ Scratch this.~~
10682
107- <a name =" lists " />
10883
10984## Lists
11085
@@ -142,7 +117,6 @@ Strikethrough uses two tildes. ~~Scratch this.~~
142117
143118* Or pluses
144119
145- <a name =" links " />
146120
147121## Links
148122
@@ -186,22 +160,52 @@ Some text to show that the reference links can follow later.
186160[ 1 ] : http://slashdot.org
187161[ link text itself ] : http://www.reddit.com
188162
189- <a name =" images " />
190163
191- ## Images
192164
193- ``` no-highlight
194- Here's our logo (hover to see the title text):
165+ ### Images
195166
196- Inline-style:
197- 
167+ <code-group >
198168
199- Reference-style:
200- ![alt text][logo]
169+ ``` php
170+ // Create array containing abbreviations of days of week.
171+ $daysOfWeek = array('S','M','T','W','T','F','S');
201172
202- [logo]: https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png "Logo Title Text 2"
173+ // What is the first day of the month in question?
174+ $firstDayOfMonth = mktime(0,0,0,$month,1,$year);
175+
176+ // How many days does this month contain?
203177```
204178
179+ ``` python
180+ static int
181+ _is_legal_capsule(PyCapsule * capsule, const char * invalid_capsule)
182+ {
183+ if (! capsule || ! PyCapsule_CheckExact(capsule) || capsule-> pointer == NULL ) {
184+ PyErr_SetString(PyExc_ValueError, invalid_capsule);
185+ return 0 ;
186+ }
187+ return 1 ;
188+ }
189+ ```
190+
191+ ``` javascript
192+ const cat = {
193+ id: ` ${ i} ` ,
194+ slug: category,
195+ parent: ' __SOURCE__' ,
196+ children: [],
197+ internal: {
198+ type: ' forDeveloperCategories' ,
199+ },
200+ };
201+ // Get content digest of node. (Required field)
202+ const contentDigest = crypto
203+ .createHash (' md5' )
204+ .update (JSON .stringify (cat))
205+ .digest (' hex' );
206+ ```
207+ </code-group >
208+
205209Here's our logo (hover to see the title text):
206210
207211Inline-style:
@@ -212,7 +216,6 @@ Reference-style:
212216
213217[ logo ] : https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png ' Logo Title Text 2 '
214218
215- <a name =" code " />
216219
217220## Code and Syntax Highlighting
218221
@@ -259,8 +262,6 @@ But let's throw in a <b>tag</b>.
259262
260263Again, to see what languages are available for highlighting, and how to write those language names, see the [ highlight.js demo page] ( http://softwaremaniacs.org/media/soft/highlight/test.html ) .
261264
262- <a name =" tables " />
263-
264265## Tables
265266
266267Tables aren't part of the core Markdown spec, but they are part of GFM and _ Markdown Here_ supports them. They are an easy way of adding tables to your email -- a task that would otherwise require copy-pasting from another application.
@@ -298,8 +299,6 @@ The outer pipes (|) are optional, and you don't need to make the raw Markdown li
298299| 1 | 2 | 3 |
299300
300301
301- <a name =" html " />
302-
303302## Inline HTML
304303
305304You can also use raw HTML in your Markdown, and it'll mostly work pretty well.
@@ -322,9 +321,7 @@ You can also use raw HTML in your Markdown, and it'll mostly work pretty well.
322321 <dd >Does *not* work **very** well. Use HTML <em >tags</em >.</dd >
323322</dl >
324323
325- <a name =" hr " />
326-
327- ## Horizontal Rule
324+ ### Horizontal Rule
328325
329326```
330327Three or more...
@@ -356,7 +353,6 @@ Asterisks
356353
357354Underscores
358355
359- <a name =" lines " />
360356
361357## Line Breaks
362358
@@ -382,7 +378,6 @@ This line is only separated by a single newline, so it's a separate line in the
382378
383379(Technical note: _ Markdown Here_ uses GFM line breaks, so there's no need to use MD's two-space line breaks.)
384380
385- <a name =" videos " />
386381
387382## Embed Videos
388383
@@ -396,9 +391,9 @@ Use an iframe :)
396391
397392Push it. Push it good.
398393
399- <a name =" callouts " />
400394
401- ## Callouts
395+
396+ ### Callouts & more
402397
403398``` no-highlight
404399<call-out>
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