Pre-flight checks before every post

In short: Before sending, PostMesh checks each network’s caption limit, media type, size, length and shape, and the settings a network requires. Errors block the post until fixed; warnings don’t.

What’s checked

Caption length, counted the way each network counts it, plus hashtag and mention limits

File type, file size, dimensions and aspect ratio

Video length and frame rate

Media the network requires: Instagram and TikTok need a photo or video, YouTube needs a video and a title

TikTok: who can watch, and branded content settings

Reddit: a community’s required flair and the post types it allows

The time you picked, which must be within 12 months

Photos are converted for each network: the right format, resized, and padded with a soft border when the shape is out of range.

Common messages

Message	What to do
Reel allows up to 2200 characters (2301 used).	That network’s caption is too long for its post type. Shorten it, or give that network its own caption. When scheduling, the message starts with the network’s name.
Instagram requires media	Add a photo or video, or leave Instagram out of this post.
Choose who can see this TikTok post	Pick a privacy option in the TikTok settings.
Branded content cannot be Only you	Choose another privacy option for branded content.
Publishing currently supports one attachment per post	Keep one file; save the others as separate drafts.
An attached file is no longer in storage. Attach it again.	Remove the file and attach it again.

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Pre-flight checks before every post

What’s checked

Common messages

​What’s checked

​Common messages

What’s checked

Common messages